I had this too during my first trimester and it was so frustrating because everyone kept saying morning sickness should be in the morning. For me it seemed to build up through the day, especially when I was tired or hadn't eaten properly, and by night time the gagging would start during my routine. It might be worth mentioning to your PD or gynae at your next visit just so they know what's happening and can reassure you or suggest what might help, but from what I hear it's pretty common for nausea to peak at different times for different mums.
just woke up to gagged 🥲