Will I ever fall pregnant?!

A Bit About me... Im 27 yrs old, Have a 10 yr old son from previous relationship. Me and my current boyfriend have been together 4 years and have never fallen preg. We have been trying properly for the past 2 years but nothing so far... I'm using clearblue digi opk .... This cycle I got my peak on Sunday (cd14) BD on cd 7, 11 & 14... reason for not being more active is we have tried it everyday/every other day and nothing so far so tried it this way this cycle... I can't help feeling like AF is going to show her ugly face around 20th March 😡 I really hope it will happen one day as me and my bf want this so badly.... any advice or ideas gratefully appreciated! Baby dust to u all and fx and good luck xxx 🙏🙌🏻 xxx