Pregnant and bleeding...why?

Sharice
I took a pregnancy test the 12 of this month which it was a thursday and it came out positive then I took one the 15 a Monday and it say the same thing I went to the clinic they tell me come back the 22nd which was yesterday...OK yesterday morning I start to get spottings I told the doctor about it she said its normal she did a pap smear and she said she have to send me to the hospital cuz she's seeing a Lil more blood than its suppose to have so I went up to the hospital to get a altra sound and the guy told me that the fetus is too small that I have to come back 2 Mondays from now when I came home I start to bleed like I'm having my period and I'm suppose to be 8weeks can somebody tell me what's going on?