For DEILD, does it make much of a difference at which point in a REM cycle one makes a DEILD attempt?

Last night I awoke from a dream, and as I do for journaling I remained still with closed eyes and exercised recall. Recall was immediate and since I've been thinking of trying to DEILD I did so. It was kind of neat, as I lay there and within a few seconds the dreamscape formed around me and as far as I could tell I was right back at the last part of the dream I remembered: In a Viking longboat in a very heavy sea. I was about to do a RC to confirm and then I find myself waking up again. I repeat and end up back in the dream, and again I attempt a RC only to find myself waking up again. I attempted to re-enter the dream again but to no avail.

I'm wondering if this what at the end of a REM cycle and it was just spent? Is that possible?