Worried about Gfs well being after going MIA for a while. Told i was fucked up

Me (33M) and gf (30F) have been together for about a year now. we agreed that we didn't have to always be in constant contact with each other as we both like our space. that being said we usually don't go more than a few hours without responding to each other or checking in no matter what we are doing. i'm a little better at it then she is, which is fine. she doesn't like to be on her phone and when she is out with other people she doesn't really like it when others are always on their phones. i usually respond back to her as soon as i see her messages just because i like talking to her. i don't respond back every time but most of the time. i just don't want her to ever worry about me.

this brings me to the meaning of my post. the other day she had a "work event", cool, no problem there. i didn't get any other details about the event. didn't know what it was or how long it was going to be. we began our day like any other. messages in the morning and what not and she was saying to me how she was going to have a hectic day. she then messaged me a bit later saying how it actually wasn't as hectic as she thought it was going to be. i replied back with "that's good babe. i hope it stays that way for you and i hope you have a wonderful day." she didn't respond back. fine, i figured she got busy. a few hours later i messaged her asking her about something that she was supposed to get from work and that i hope she was having a great day. she did not reply back again which i thought was a little strange but i figured she was at her work event.

that night i had baseball and i got there around 630 pm at that time she still hadn't replied back to me. i wasn't going to bug her so i just left it at that. i left my phone in the car and played my game. i got back to my car around 930 and looked at my phone and she still hadn't replied to me. now, i'm starting to get worried. she has never gone this long without replying to me. i still just left it and went to have a few beers with the boys. i get back to my car at 1130 and look at my phone and still no reply! ok, now i'm tripping. this is so weird and again i had no details on this work event so i had no idea how long it was going on for or what it was. so, i message her "hey! are you ok!?" after 5 mins i decide to just call her. she picks up immediately and says "im at my work event and its really loud i cant talk." and hangs up the phone. ok im glad shes ok but i will admit at that point i was a little annoyed that she hadnt replied back to me for hours.

now, me personally i will always respond back to my girl in a timely manner as i never want her to worry about me, that's just who i am. nothing is ever that important that i would go hours without messaging her. even so i believe that there is always a chance to send a message especially to your SO, you just choose not to send the message. but i digress.

later that night at like 2 in the morning she messages me asking if i could pick her up. i was already in bed and didn't see her message or else i would've gone to pick her up. the next day we message each other in the morning and i asked her why she never replied back to me for so long as i was curious and i was really worried about her. she replies back saying how she was bonding with her boss and she had no chance to reply back and that she never really looked at her phone that whole time as she was doing something more important. i told her that i was happy that she was able to bond with her boss and how i know it was important to her and her career, but that i was really worried and i would've appreciated a reply back even something simple like "hey im fine babe, have fun at baseball will message you later." she then proceeded to tell me how i was fucked up for being upset and that i should just get over it.

that statement really hit me. i went from being genuinely concerned about my girls well being. literally heart racing thinking the worst to being told i was fucked up for feeling that way. needless to say we ended up in a big stupid ass fight

i just want to know. was i in the wrong here? what would you have done? i didn't meant to start a fight. that was never my intention. i was just very worried about her. should i have just let it go as soon as i found out she was ok? should i not have expressed how the situation made me feel? im a pretty open and honest guy and i didnt want to lie to her. i just cant help and think that i would never have done that to her and then call her fucked up for being upset. any insight would be great. even if you think i am in the wrong, i would like to know why. im always trying to learn and grow

TL;DR: was worried about my gf after going a very long time without replying back to me which was very strange and unusual to be told i was fucked up for feeling that way. just want some insight on the situation