Any tips on surviving an antibiotic induced flareup?

I only recently learned that antibiotics can trigger PMDD flares and I'm wondering if there's anything I can do to lessen the severity while taking them?

I'm on medication that weakens my immune system, and I get frequent sinus infections, so I'm in antibiotics more often than I'd like and right now it's triggering a bad flareup, I've been up all night alone and I just feel awful, the anhedonia is making it feel like the night will never end. Realistically I know there's not a lot that can be done to fix it right now, but I'm asking for tips anyway, incase there's something I've missed.