FET timeline

So I have my ER on 13th. I should have the final results about the embryos by 19th. My doctor said I can go for FET in the May cycle.

Now, my question is what is the timeline for this transfer? I am taking a decapeptyl trigger. So based on the info available online, I should get my period between 7-10 days from ER.

So wil the transfer happen in the cycle that starts in 7-10 days from ER or do they wait an extra cycle? I mean this period will be in April and my next cycle will start in May.

Any insights will help.