False positives

What's the chances of getting two false positives? I took two pregnancy test both were really faint line showed up within 3 minutes but gradually got darker within 10 minutes. Has anybody ever had a false positive? I don't want to get my hopes up. I'm going to the doctor next week to verify if I'm pregnant or not. So far the only symptoms I'm having are cramps! Pray af doesn't come! Picture one was taken 8 dpo and picture two was taken 10 dpo.