Sounds like SIBO. If so, you'll need to drastically change your diet from now on (there is a lot you can find online to help with SIBO diet guidelines). Antibiotics help the flare ups and are certainly necessary during these times, but they are definitely not a long-term solution to the problem, and will, in time, do more damage than the SIBO itself.
My sister has been suffering from SIBO for the past 14 months and it pretty much turned her life (in regards to food) upside down. She too has been through her share of antibiotics as well. In short, SIBO is brought on by an excessive overgrowth of bacteria in the small intestine. So this can be brought on over time, or, like in my sister's case, can be brought on very suddenly if you have suffered a bad case of acute gastroenteritis (AKA 'stomach bug/virus').
The actual 'healing' process is a long and difficult one, unfortunately, although this could depend on how bad your case is (assuming you have SIBO). Special medication is involved, but changing your diet to SIBO friendly foods will not only speed up the healing process, but it will keep the flare ups at bay also. Food is the number #1 thing about SIBO that will either make you or break you, so sticking to a SIBO friendly diet is critical. My sister has found this out the hard way a few times.
Off the top of my head I know that some huge negative triggers for a SIBO flare up are asparagus, onions, mushrooms, and garlic. But, sadly, there's a lot more. :-/
*Also, buy good quality digestive enzymes. It will really help in breaking down and properly digesting food you eat. Just another way to help ward off the flare ups. Everyone should take digestive enzymes actually (I take them). Works wonders.
Sorry for all the info, but IF it is SIBO, this is very important stuff to know. I'm sorry you're going through this. I hope you get better soon.