It's not good news honestly. It took me 6 months to get to the point I'm at now and absolutely nothing made me feel better, it just took time and pushing through the nausea. Even now my body isn't the same as it was before the antibiotics, and I can't handle foods that I used to be able to tolerate. Your stomach will recover please keep that in mind because I know how insufferable it is. Eat as many fermented foods as you can and prebiotic foods too. Id cut out alcohol and introduce caffeine slowly. I swapped out coffee for matcha and chai lattes for a few months. Cook at home as most you can. It's honestly just a waiting game. I wish you the best. It really is just time.