I Had Vaginal And Rectal Prolapse Surgery About A Year

I had vaginal and rectal prolapse surgery about a year ago. I have gone to work as a CNA pulling and lifting patients. Since then, I have had uncontrollable gas and problems with BM. I have to lean back, straining and Rock back and forward. I also don't have a BM but once or twice a week. Could I have damaged my surgery? Or could this be something else.