Worried

Okay so I've been having really bad pelvic pain for over a week now I went to the dr and pregnancy test was negative. She said my cervix was red and turns out I have a yeast infection but didnt have any of the usual symptoms of a yeast infection. I have to wait a week to get an ultrasound done and I'm nervous I've never had pain like this before. I switched birth control last month and stopped taking it at the end of the cycle because my husband and I want baby number two. I haven't had a period since the end of April too. Just wondering what in the world is going on with my organs 😫