Hi shirley have you got a blood test yest at the docs, i would ask for one if you haven't!
i think that i had a chemical pg as i had a bfp but got bfn at docs on friday and af got me over the weekend
are you still bleeding? it certainly sounded to me like you were pg with the bfps and sickness esp as you had bfp the morning the bleeding started. some ppl do bleed in early pg so it is more common than you think