2 months is still pretty early in the recovery! They did a lot of work in there...cutting through ligaments, and nerves...it could be the sutures letting go and your body having to now pick up the slack the sutures were managing...it could be nerves waking up...2 months is still early...it takes a full year to completely recover from abdominal surgeries such as this...so be patient and be gentle with your body...if in doubt though Please Call Your Doctor! That is what they are there for and they can take a look if for nothing other then reassurance that all is healing well...if still in doubt a second opinion is never a bad idea! Keep healing! It will get better!
How are you feeling now? If you are still having pain, I hope you have had it investigated and have answers.