Norovirus - lasting forever

Our son came home from daycare with what I’m assuming is norovirus about a week before Christmas. Projectile vomiting and some diarrhea. Vomiting lasted about a week, diarrhea is still occasional even at day 18ish.

Then I got it, mostly diarrhea for a week and then i started to feel better. Had minimal appetite for a week and barely ate. Cue vomiting on day 7. My diarrhea hasn’t eased and it’s been 12 days. I stopped taking Immodium for about a week. I have since restarted my Immodium, guar gum and continue with my amitriptyline (never stopped the ami).

I’m starting to worry that this whole infection has retriggered my IBSD which was mostly in remission before this. The interesting thing is my child still has occasional diarrhea after this as well, and he’s thankfully not diagnosed with IBS. Essentially I’m looking for anyone else who had 12+ days of diarrhea from an illness? What helped?