AF is 2 weeks late :(

Elizabeth
So I'm 2 weeks late with 4 BFN. I have an appointment with my OB Tuesday to see what I can do to aid in getting pregnant. DH and I have been trying for a year and a half with 1 miscarriage a year ago. 
​I was really hoping I would get a BFP before my appointment but that's not going to happen. :(
​It's so frustrating seeing my younger sister and old friends from high school get pregnant and I can't. I'm happy for them but also very jealous. Hopefully AF will start soon so I can't start trying for next month.