Lulu,
Hun please dont give up, I hit rock bottom my last cycle to the point it was a very scarey place as I sat after doing 2 HPT on a Saturday and got BFN's I went to the BT on monday and when they called me back to say Congrats I said No No I have tested and it said no and she said well I can tell you different and that was a DPO 14 Hcg of 180 so it wasnt low it just took its time getting there.
Hope this is the case with you.
Bec