period & possible pregnant?? UPDATE !!

is there anyway I can have a period and come out pregnant?? Saturday afternoon or Sunday morning I was having light pink bleeding after 6 days of being late. Since it was so light I was wearing a panty liner and I had to put on a pad because a little bit of blood had came out and I didn't want it leak so I put on a pad and I haven't been bleeding since. I have very bad headaches and I feel awfully nauseous. Within those 6 days of being late I was sexually active without any protection. I'm thinking about getting a test but the stores been closed due to hurricane Harvey. But if its not possible then I don't want to waste money on something for it just be a negative. Please help??

edit: also I was on the depo for 6 months and got off in April, haven't had any type of birth control since. is it still possible??

Update: I am not pregnant idk what it could've been