VERY URGENT

hi mummies. i have been having cough for over a week now and it progressively gets worse everyday. just today i realised that i have a bulge of tissue protruding out of my vaginal opening. it doesnt hurt but shld i be concerned? is it from all the coughing? i also pee with every cough like i cannot control it at all. please help. my mum says its normal cos im alreasy at 31 weeks now so my cervix is bound to be swollen. but im really worried.