Pregnant or paranoid?

So recently ive been thinking im pregnant because i got a sore tummy a couple of days ago and my discharge is very watery. im on the pill so i dont ovulate and my next period is in 9 days. i havent had any blood or anything but my discharge goes from sticky to soaked wet everyday. I also have constipation and sharp pains in my ribs and middle of my back. i never ever miss a pill and my boyfriend always pulls out well before hes ready. i dont know if im looking too into it or really am a few weeks pregnant any thoughts??