Can you still be pregnant and be on your period?

Amanda • Me and my honey are trying to convince baby #3. We want our little girl. 😁👶🏽👣
I was wondering if you could still be pregnant and be on your period. I'm asking because I was 15 dpo and 7 days late for my period and I'm normally never late and kept getting bfn when I tested. Then on day 8 AF shows up. Has anyone still been pregnant while having their period still??