Pregnant? Desperate need of help

Bb
I finished BC mid March and have had a period on again off again but always really heavy from day 1. I had unprotected sex 7 and 8 days ago and yesterday I began bleeding but not like my typical period much much lighter enough to wear I needed a tampon but it doesn't fill the entire tampon up. I also have been cramping but also not as bad as my typical period and lower back pain. I checked my temperature as well and it's a little higher at 99.1. I tried to check my cervix and I am not 100% sure what I felt was right but I think it was high. But again not sure. I have an appointment with my doctor Monday but waiting all weekend is going to kill me! I want to be pregnant so bad!