Teen,
You had open surgery didn't you?
I am 3 weeks post-op after keyhole so am having no such problems, but two years ago I had an ectopic pregnancy and ended up having emergency open surgery to remove the damaged fallopian tube. After that surgery I did struggle with coughing and sneezing and the best way to deal with it is hold a cusion to ur tummy and lean forward a bit before you cough or sneeze.
At 6 weeks I would presume it should only be a mild discomfort by now, if its anything more than this I would mention it to ur GP just to be on the safe side, no need to be in pain if it can be helped x x x