What would you do?

Okay soooo according to two different apps it has been 81 days since my last cycle. I am normally irregular but have never been this far in between cycles. Both apps agree that my average is about 48days. If i go by that, my last cycle was jan. 20th and i think judging off my CM i ovulated between feb 17th to feb 25th time frame. Sounds great right? Well not exactly because i am getting BFN and if i go by all these calculations id be 8 weeks pregnant but like i said im still getting BFN...

No signs of cycle starting at all. Drs. Appt tomorrow, just wanted input from you ladies😏