PMS Supplements?

After a long bout of feeling really good, I'm back to a flare up again. I can't complain too much, because my gastroparesis considered mild, and most days I seem to do alright with a somewhat restricted diet, pepcid, and buspirone. However, when I get hit with flares I seem to really struggle. I am starting to think PMS may be the cause of my flares, and was wondering if anyone takes specific supplements to help with that? I'm still relatively new to GP and learning as I go, so any advice would be useful! Thank you!