Am i pregnant again?

Jennifer • Mom of a 16 and two yr old...21 weeks and 2 with baby # 3
I am almost 4 weeks postpartum took a pregnancy test yesterday which was 12.8.16 and to my surprise it was positive....me and my husband have had unprotected sex 3 times since 2 weeks pp and he came in me all times...what do u all think? Tweak if u have to