please help me?

I took the morning after pill on the 21st july and bled for two days a week after which has now stopped. my problem is I thought I had thrush as I was having the need to go wee more often and feeling like I always had pressure on my pubic bone so I took thrush medicine which made it ok for a couple of days and now the symptoms have come back as if I have a uti infection. I have been drinking a lot of fizzy drinks and been abit stressed. I did take std test and that was negative after a week after sex but can the morning after pill cause uti or thrush what is happening all I want to do is pee and after I go I have pressure on pubic bone. no pain the only pain I have is my hips. please help