(Possible TMI) 27 weeks pregnant; complete loss of bladder

Any time I cough or sneeze I pee myself.. a lot. I'm sure it doesn't help that when I have to pee and go to the bathroom, I can't empty my bladder completely. It has been like this since the birth of my first child and is only getting worse now that I'm pregnant (no, it's definitely not a uti, either). So anyway, sometimes I can just be walking, not really feeling like I have to pee.. and out comes a lot of pee. It's horrible and the pads I have to wear are giving me a bad rash. I'm at the point where I don't know what to do. Is there anything I can do to help control my bladder, or at least is there a bladder leak product that won't give me a horrible rash...? Is it even normal to lose control like I do? It happens probably 6 times a day or more....