Stuck in the middle - all tests point no, but where's AF??

No one ever told me TTC would be this stressful! DH and I decided to TTC#1 last cycle (sort of a "last minute" decision so I didn't chart anything) and now I am 15 days late. I have been off BCP for almost two years, and for the last 12 months my cycles have been regular, give or take a day or two. I have taken more HPT's then I'd like to admit, then had a blood test taken @ 10 days late and also a BFN! I've been cramping for a week, but no AF. My boobs hurt, I feel "icky", peeing all through the night, moody, and all that good stuff. Doctor tells me I'm not pregnant, so why can't I shake this feeling that I am?? Part of me thinks, ok good, I can take my allergy meds again, have a glass of wine, etc., but the other part is paranoid that I will do this and find out in a few weeks that indeed I am pregnant. Ah! These are the days that I wish DH and I had an "oops"!