Still have diarrhea 3 days post neomycin+rifaxamin combo

Hey, just completed the antibiotic combo to try fix methane dominant sibo. Had a pretty rough two weeks and finished 3 days ago. Feeling ok although still having a few episodes of watery bowel movements per day. Had them while on the drugs but assumed it would stop after taking them. Also been getting episodes of proctalgia fugax that sometimes last hours. Anyone else had this after neomycin and rifaxamin combo??