Getting ghosted in a brand new relationship? 26f,26m

I'll try to keep it short but I started dating this 26f recently I am 26m. We went on a bunch of dates and hung out for a month and I recently asked her (like 2 weeks ago) if she wanted to be exclusive and be my girlfriend and she said yes. It's been going fantastic. However, we hung out on Thursday of last week and it was great and the last I've heard from her was a text Saturday morning, it's now tuesday. I've texted her 3 times since then (trying not to be obnoxious) and I tried calling once (no response). She's posting stuff on her story so I know she's on her phone. I think she just lost interest and is ghosting me? I think if I don't get a response by Wednesday I'm just gonna drop some stuff she left at my place back to her place and just call it off. At that point it'll have been 5 days with no contact at all. There is nothing at all that happened that was in any way negative that's why I'm so taken back by this. We were planning a trip together and having a great time I don't have the slightest clue why I'd be getting ghosted. I think 5 days is WAY too long of a time to say nothing at all not even a "sorry I'm busy" text. Would you guys give up at 5 days? Cause i can't lie it's really bringing me down.