Missed period?

Laura
So a bit of background first. I had the implant untill April this year, then went on to Cerezette for 2 months. In this 2 months this pill (along with other shittiness) made me the lowest I have ever felt. So after 14 years of contraception, I made the decision to stop & just let Mother Nature do her thing. 
Since May I have had 3 periods, at a cycle length of 20-24 days. Now I am on day 40 of my cycle. Hubby & I did have sex during my fertile time, but we used condoms & it was intact afterwards. We don't always put the condom on straight away, he's not use to them after not having to use them using the implant. 
I have had some minor cramps this week, but no AF