Help please

I did a pregnancy test and it was inconclusive. My breasts feel sensitive and my nipples turning darker. Have bubble like feeling not constant but comes abd goes under my belly button. Moody. Cant wear my jeans as they are so so so uncomfortable recently on the waist. Always thirsty. Rapidly pressed for pee. Have severe back aches and have tummy aches. Funny enough it is only under my belly button. Saw urologist and all is fine. Now waiting to see gynea. Can anyone explain?