Cycle day 39 AF 7 days late still BFN

Hi ladies, Little back story - I was on BC pill for 2.5 years and before that I had regular periods with cd 30-32. Last day of my period was Dec 25th came off BC on Dec 27th, never had withdrawal bleeding but I did ovulate and we did baby dance before the ovulation day, that day and after too. Took a pregnancy test after I missed my period and till now it’s BFN and no sign of AF. But I am still getting positive opt. Have visible veins in chest and headache every day(it’s was one of early signs in my 1st pregnancy). My so confused. Do have an appointment with my ob/gyn on feb 7th but I will go crazy by then. Any insight would be appreciated.