How long on Burserelin before a bleed?

[Greyeverything]

Here we go again, down regging for 2nd FET or should I say trying to!

Day 12 of burserelin injections and no sign of a bleed. Last time round I was on it for 8 days I think before a bleed so this is very different.

Really worried something is wrong because after the last failed FET I stopped meds and bled 3 days later then no period for well over 40 days (usually 31-33 day cycles). Had some brown for a few days mid cycle as well which never happens for me. Regardless of that I still started injections on day 21 as planned. Clinic didn’t seem bothered about long cycle.

Anyone’s periods been really messed up after failed medicated FET? Starting to worry about what happens if you don’t bleed?? Will they cancel the cycle? 😩