Missed period, Negative test

Drella

This is my first month off of the Nexplanon for 2 1/2 years. I got the nexplanon removed on February 6th and got AF 1 week later on February 13. It is now March 24 and still no AF. No signs of AF, No signs of Pregnancy 🤰 except missed period but it could be my body regulating. I took a test on March 21 BFN. I really just need help I don’t know what to do and it’s stressing me out 🙄