Trying to conceive

Laura
Hi
I came off the implant in December. I've had three periods so far roughly 32 days, 28, and now 26 days 
I can't work out when I would be likely to conceive as the months keep changing 
Does anyone have any advice please 
I know everyone says it'll happen when it's meant to happen but I'm having sex (with the same person) 😂😂 quiet often so not sure why nothing is happening 
Thank you