My husband and I have been ttc for 2 years.

I am 7 days late on my period, I am usually regular. I have been charting for a year and my cycle starts when the tracker says every month. I went to the doctor yesterday and got a negative blood test. I also just took another home test and it was negative. I really don't know what to do. It's so frustrating. I can't focus on work or anything. I haven't had the energy to do any chores. Ugh.