IS WHAT IM FEELING NORMAL??

Lately I've been getting lots of discomfort in my uterus. and then lately I when Ive been breathing in and out, I've been getting a pain in my higher stomach. and sometimes when I sit I get really bad pains. they might be gas related but I have no idea. Then randomly last night I got one single stabbing pain in my rib. please help? are these okay to feel? or should I go to my doctor. I am about 12 weeks pregnant.