25 weeks 2 days and feel ILL

Ugh. Dont know if it was something I ate? Bad keilbasa that my FIL brought over??? Or the farm we visited today that had lambs and goats and cats and roosters at it?? Didn't touch anything and washed my hands after petting a cat's head... or what?? Maybe because I have been constipated the past few days?? I feel like HELL. Sick to my stomach and nauseated. Feel very full and my belly is HUGE. I walked around the house a bit and tried to go to the bathroom and passed a few small BMs... but nothing major... I still feel queasy.. maybe I should have taken my B vitamins with my prenatal this morning... havent taken the B vitamins in a few days.. they smell bad... but maybe that why I feel sicky now? Who knows.. UGH!!!! This sucks. Feel AWFUL.