Bowel Issues Following Tummy Tuck

I am 7 weeks out from a full tummy tuck with hernia repair (hernia from gall bladder surgery found during surgery). I realize I am not fully healed, however I have significant bowel changes. These changes are excessive pain with gas, I can hear and feel gas in my abdomen and my sides. Gas and bowel movements have an extremely strong odor like I have never known. I brought this up with my PS and he flatly responded it had nothing to do with my procedure even though these began immediately and have not gotten any better. What could be causing these problems and is there anything I can do?