Has anyone had a period and been pregnant ?

Ruby

I just found out I'm pregnant but I'm 100% sure I was pregnant December.I had very strong symptoms and iv had intercourse the entire fertile week of November. In december I only had intercourse the first two days of my fertile week and they were no where near my ovulation day.This month I had spotting 4 days before due period and it lasted 4 days I waited 2 weeks and took a test and I'm pregnant. I'm suppose to be 5 weeks but I feel like I might be 10? My mom said she got her "period" the first three months of pregnancy with my little sister. I'm confused