Doctor said i have a “trigger point”

I met with a ob/gyn thats in my network today to schedule a lap. I talked about my pain, how it was everyday, it gets worse when i eat, etc. He felt my stomach and diagnosed a trigger point? He said that he could do a lidocaine shot and the pain would be gone for 5 days. I agreed and he gave me the shot. Not even 5 hours later and the shot has worn off and the pain is back. I’m super frustrated with him but I did schedule surgery. I’m just nervous that he lied about something else and I’m getting myself into a bad situation by having him do surgery. Any advice?