Am i going crazy?

Jessica
Ok, maybe not crazy but I'm on cd44 of a cycle which usually lasts 32-36 days. I've been testing with hpts every day for a week but have gotten nothing but BFN. I ran out of hpt so I used an opk because I read somewhere that they can pick up hcg as well. Well, 2 lines showed up...but this was after a definite negative just yesterday. Advice anyone?