Hi, are you feeling particularly stressed at the moment? the only reason I as is that my partner gets similar symptoms when she's down and low, being stressed can have some really weird effects on your body.
As with the excessive peeing, does it hurt when you urinate? if so it could be Cystitis but that wouldn't explain the other symptoms, my partner gets Cystitis when she's stressed also and the best thing she finds is pure cranberry juice.
On the other hand if none of the above sounds like what your going through at the moment I would get down the doctors, I'm not the sort of person to endorse going to the doctors every time somethings up but in this case I think it warrants it.