I agree with Dian; you should ask the doctor to check you for infections.
Curiously, I read recently that your urine will produce a very strong odor after you eat asparagus! So I guess it's possible that an odor might be caused by something you've eaten. Have you added anything to your diet lately?
Sounds to me like you have an infection. A vaginal infection doesn't feel like a urinary track infection. If you have been experiencing this since your surgical procedure it makes sense there is a connection. You need to contact your surgeon (or his nurse) and discuss what is going on. It could be as simple as a yeast infection.....no matter what is going on.....it needs to be addressed.
Peace.
dian