Advice?

Amy • Wife ✨ Momma to a little girl & a little boy #3 on the way!
So I tested positive on a dollar store test yesterday. It wasn't faint, it was there. And then this morning with a clear blue plus it was mostly negative. I see a little line but not really. My period is supposed to come Saturday. My boobs are killing me and just get worse by the day, and they've never been sore before any other cycle and have been killing me since ovulation. And I've noticed increased CM. which I've never had before. I don't know what to do. I'm on medication that I cannot take if I'm pregnant. I just want to know. My doctors office scheduled a confirmation on July 27... But that's too far away. I'm confused and upset and don't know what to do.