Bladder problems. Three times since jan.

Let me try to sum it up. Im a female and 19. I've had many bladder infections. Usually they go away. However this one hasn't since January. Been on two antibiotics. Only worked while I was on them. My symptoms are frequent urge to pee and burning during and after. Seriously the burning lasts all day. Everyday. I know the ins and outs of bladder infections so i know I am doing everything right on the outside of my, you know. Tonight, as Im laying down, it feels like I have to pee. I just went. Twice. And it feels like I haven't peed in hours. My tests came up negative for bacteria as well. So. Yeah. And idk if this plays a role or not but my doctor thinks I have pleurisy now. Unclear. Lungs were clear, just pain while breathing. Im on an anti-inflamotory and the pain won't go away and has to get better. So. Idk what to do or think. I've been to the doc three times since Jan...