10-11 DPO BFN

I told myself I wasn't going to test until after Wednesday when AF is due but I totally caved today because Glow told me to. BFN. Tomorrow I'm going for a blood test to see if I have any underlying problems and to see if I might be pregnant.  I really thought I was going to see that BFP today. I don't feel like I normally do before AF. I feel a cramp here and there and a stretching in my uterus. Normally I'm cramping, bloated, and grouchy. I don't know what to think. Good thoughts and prayers would be appreciated.