Severe left side pain: Colon then liver??

Hello
I recently had laprascopic colon surgery July 11.. I am slow healing and waiting on my next step.with my oncologist.. I have been getting better every day. Suddenly Friday evening I started getting sharp pain in lower left side around back to front.. I took Tylenol and helped a little.. last night's it felt so.bad I almost went to er.. but I passed out from exhaustion.. still stabbing pain this morning but tolerable.. is this.normal? Does it mean I have been doing to much activity? I'm suppose to go back to work Aug 22 and I feel no way as of now.