Can someone help?

Celina

Hello! I’v been TTC for about 5 months. My cycles are on average 35 days and currently I am on day 37. AF was supposed to arrive on February 17th. I took a pregnancy test today and I got a BFN. My BBT has been increasing gradually. What do you ladies suggest I do? Thanks in advance! 😘 Here’s my bbt chart for this month.