TMI - discharge?

I started experiencing a lot of white discharge around 4 months ago, after self treating for thrush twice I went to the doctors who instantly pinned it on thrush however did some tests which reviled it was not thrush or BV the discharge continued all through my cycle and I was getting on and off back pain and pelvic pain I was showing high white blood cell count so was given antibiotics thinking it was PID however this didn't clear anything and I was sent for a ultrasound, this all came back okay but the discharge and on and off pain continued (by this point I've had 3 sti checks at the doctors) so I went to the sexual health clinic who done all the sexual health tests and diagnosed me with strep B and told me if the discharge hadn't cleared they'd treat me... one month later I returned the discharge is worse, they treat me with a 13 day course of antibiotics however this hasn't worked and the discharge has become heavier the last week and i feel so wet that I keep checking if I'm bleeding. There is no offensive smell however i do notice there is a scent.

Has anyone had this happen to them?

Any ideas what it could be?

Im very scared it could be HPV or something similar