feeling sick


hey i just need some advice from thursday till late afternoon yesterday i had dark brown blood only when i wiped and twice i have dark red. this stopped yesterday. my af was supposed to be on friday so i am 4 days late today. i have been feeling really sick. i have had light cramps during the day but in the morning the cramps hurt a little. i also have had bfn when testing. i also am on cd35 . please any advice would be great. xxx thanks