Short Luteal Phase on Clomid?!

I've had 3 failed clomid attempts - first 2 we were hardcore swaying (jellies, abstinence, cut off, 1 attempt, heat pack etc)
Last attempt - laid back with rephresh, only a little bit of Sylk (for lube reasons, really), multiple attempts around O, no heat pack.

I know I still have used some factors that could stop me from conceiving but I also just noticed that
AF or spotting arrived last night, on 10dpo.
My OPK was + on cd15.

I assumed clomid would lengthen my LP.

Any opinions or experience with this?

TIA

it should extend LP but you need to be sure you're getting adequate fat intake for your body to make progesterone with - full fat yogurt every day and 4-6 eggs a week. 10 DPO should be just enough

I would drop RepHresh and Sylk for next month and that will give you 2 months where you can even consider add in Preseed