Ok ladies please HELP!!!! :/

Massy • Mommy of preemie twins born at 29 weeks with IVF fresh transfer

Okay ladies please help??! I have done ultrasounds, bloodwork and the HSG exam. My hubby has done his semen analysis and everything seems normal. I thank god for the normality  but no baby yet ??? so I never paid mind to opk's before, but this cycle I decided to try it. I am confused because I went with Glow predictions it states that my fertile week started on 10/15. So I started using my first opk on that same date so far 2 negative opk results. 

​Should I just keep in testing until I get my AF?
​Or
​Do you think I might have missed it by not testing right after AF ended? 
​I'm so confused and overwhelmed with this roller coaster ride.
​I also have a follow up appt with my fertility doctor on 10/22 !!!! 
​Hope I can find answers already :/ 
​Only thing I think I did good is that although I didn't star using opk's right after AF ended, I did start BD'ing (sorry if tmi)