Was I wrong for this with my girlfriend?

Me and my girlfriend are 18 and today we weren’t able to text throughout the day since that’s what we usually did but yesterday at work we couldn’t since she had a long shift.

She said she was leaving and I said I can’t wait to hear your beautiful voice cause usually she will just call me when she gets home and I don’t want her texting and driving. She got home and she said she would call me when she settled down I didn’t even ask if I could call. I waited till she called me and she called me and we were on the phone and she said she had to do homework so she hung up. Then she texted me saying she was upset because she said I don’t have to wait for her to call me because she can still text when she’s settling down. Today was the first time she explained that when she’s settling down she’s talking to her parents or her brothers and doing the things and that she can still text. I didn’t know that since this was the first time she explained. I know this is not a serious matter but was I wrong for waiting till she called me?