My period is gone, nothing and on cycle day 49?

My period is always regular, every 28-35 days, 4 days of active bleeding. This month I have I missed my period completely. I have taken 2 test, negative. I have a OB apt in a week because I have never not had a period and I want to make sure everything is ok. I don't use any birth control we use condoms. and I track my cycles with FLO and OVIA.  My husband and I want to  actively try for kids but not for a few more months till we get our house. I get my blood work done every 6 months due to meds I take to make sure everything is on therapeutic level (seizure). My A1C, thyroid and RBC are all within normal levels. My doctor said I might have to have blood work and maybe an ultra sounds but I'm soo anxious. I have no idea what to expect. Has anyone else had this happen. My last period according to FLO was 3/2/21 and I bled for 7 days which is very odd for me.

Also to add, stress, no more than usual than any other months, no new meds, do not smoke, drink occasionally. Ladies please help. thank you!