IBS help

Amanda • Me 30, DH 35, married 10 yrs. We have a beautiful 9 yr old lil girl & a handsome 7 yr old lil boy! Practicing for #3+!😏😝
So I was diagnosed with IBS over 3 years ago. I'm pretty sure it's IBS-D(irritable bowel syndrome-diarrhea) It started when I got the Mirena after I had my daughter. Maybe TMI, but I would eat & then have to go to the bathroom anywhere from 2-5 times in a row(& it would be the D part every time). Does anybody have this & done or took anything to help? My old PCP had me try Bactrim before she moved. It only worked the 1st day. This is really nerve racking & time consuming when I have 2 little ones(3&1) & most of my time is spent in the bathroom. TIA!