UTI? Thrush? Cystitis? Side effects of Cilest? Something else?

I'm a 20 years old female and I lost my virginity to my boyfriend, on the 18th April. The last time he had sex before me, they used protection and he's been tested so he's clean.

Afterwards I itched a bit around my vagina but I could cope with and presumed it was due to the fact I hadn't had sex before so had been stretched, we continued to have sex for about 3 days while I stayed with him. The itching continued but it only became unbearable a few days after I'd come home. I thought it might be cos I had been really wet and was now dry (sounds silly I know) so I made sure I drank at least 10 glasses of water a day and stayed away from caffeine and used tea tree oil which all helped.

Then I got my period and I didn't itch at all, that finished last week and the itch came back afterwards but not too bad, then peeing burned and hurt and was dark with wisps of 'bits' in (don't know how to explain it better sorry).

Then last Monday, I began feeling nauseous then I got really sore stomach pains so I went to the doctor. She wasn't very helpful and said that I was having side effects to the birth control pill I was on, Cilest which had turned viral, this was last Thursday so I stopped taking it though I had two weeks left in the pack. I vomited Wednesday, Thursday and Friday and I gained a fever on Saturday which is still there. I got my period on Sunday. The stomach aches gone slightly but I'm still itchy, it burns when I pee and I can't control my temperature.

Help? Thanks!