Having period but seeing positive pregnancy

Alisha

I had tested Monday and Tuesday and they both came out positive! I tested this morning on a Clearblue test and usually I get BFN but I am getting a line!!!! It’s faint but it’s there! I even used the pregnancy test tracker and I can see a faint positive! Can you seriously be on period and have a positive test? I am confused. Never had this happen when I was pregnant with my other kids! Advice please!