Has anyone just got off the nexplanon birth control and trying to get pregnant?

I am I got off it in June 2015 and just started trying in December

I got off it the beginning of October and barley got my first period last month but haven't had a regular one yet my doctor said I should be pregnant by January or February how long did it take you to get a normal period

I got off in October last year and still haven't had any luck 😞