I am confused

Angela
Okay so I am so sorry this is long but I need some advice some whatever anybody is got opinions so here's my story, okay I found out on June 7th that my baby's heartbeat has stopped and I gave birth to her on June 8th I was 15 weeks along and then on June 15th I had a D&C done and was recommended by my doctor not to have sex for 14 days but they're in this time my then boyfriend was in jail and got out on the 18th he was in there for 23 days so of course we had sex several times that day it was three days after my d&c and everyday till the 30th and 5 days after my D&C I took three pregnancy tests and they all came up negative, then on the 30th I was feeling strange and took a pregnancy test and it was vvvvvvvfl and then I took 8 pregnancy test between July 3rd to July 16th and everyone of them have been positive still a vvvvvvvfl and fyi they all have been the $.88 test from Wal-Mart. I went my on yesterday and they took my blood and did a urine pregnancy test and that was neg. and got my blood results back today and it's at a 1, does anyone have any ideas what is going on??? I am so confused...these two are from the 4th....