you need to go to the doctor. Go to an urgent care center if you don't have health insurance. It is cheaper than a regular doctor visit and often they have their labs right there. You need to rule out an infections. But if you had an infection you would probably have a fever, so maybe a trip to a urologist would be better, pricey yes, but you really need to figure out what is wrong. Perhaps a muscle isn't working right or you have really emptied your bladder but something is pushing on it so it feels like you haven't, like a hernia or something. Get yourself checked out!! That is what credit cards are for. But don't go to the emergency room, unless you really have to, they cost waaaayy to much money!!