Please help so confused!

Tanya
So I had a miscarriage on nove 29 which resulted in me having a DNC . on Dec 23 I had what looked to me like implantation bleeding so I took a few dollar store tests and they came vwxk negative. So I went and bought a first response band came back vvvfl so I called my doctor to get blood work yesterday so went and got a blood test and it came back 2 miu so how I'm more confused then ever cause I took another first response yesterday which came back a another vvvfl so I assumed maybe it was from my miscarriage but took another first response today and another vvvfl so please help me with any advice or you've had something similar happen to you. Also my boobs have been sore extreme heartburn and headaches so I haven't a clue what the hell is going on Here. So the first response Picks up that little of hcg??