Hi
@Lori10, and the answer is yes, if you're busy during the day with people and activities, nighttime is when your TMS brain mechanism goes "Uh-oh, she's in a quiet place and she might think about things we don't want to look at, better give her some symptoms to worry about instead."
Hopefully you're also "doing the work" to address your repressed emotions so your brain will learn to live with them.
In the meantime, affirmations are great if they are truthful and constructive on your journey towards self acceptance (fake happy-face positivity is to be avoided, so watch out for that).
In the long run, some form of consistent meditative practice is the best way to find peace for your brain. In the short term, my go-to advice is deep therapeutic breathing, which can be done for a few seconds or minutes at a time, anytime of the day or night. I find it incredibly powerful for calming down in the moment, but also for significantly reducing some of my daily stress symptoms.
Just look up "therapeutic breathing vagus nerve" to find different techniques and choose a resource that works for you.
The more you practice it whenever you think about it, the more often you'll find yourself doing it automatically. I also do it first thing in the morning before getting out of bed and the last thing at night as I'm closing my eyes