Please help me me out. I'm confused..

My husband and I recently decided to stop ttc, due to having 2 miscarriages this year. So, I note every time he cums in me just to avoid any questioning has to if I'm pregnant or not. Anyways. Last time I have noted was on Oct. 5th (2 weeks and 3 days ago) there was a 15% chance of pregnancy that day. Today I was supposed to start my period. But nothing has come. Only symptoms I'm having are quick hot flashes, and some nausea. I took 2 pregnancy tests today and both are negative. Could it possibly be too early to show up on a home test? Should I wait a few more days before I start worrying? I'm so nervous. I've never had a late period, if anything it usually comes early. Thanks in advance! and please no rude comments.