Has anyone had a really short cycle with clomid

Hi

Having a bit of a bizarre experience on my 3rd cycle of clomid - have pcos, and have already had 25 mg and 50 mg cycles of clomid with no ovulation.

Started my 3rd cycle at 100mg and had a follicular scan on days 12 and 16 - nothing happening so I was meant to go tomorrow day 20 but my period started on sunday so my last cycle was only 17 days!

I have never had a cycle that short but I was beginning to wonder if I had ovulated before day 12 as my temps were quite high and they were due to test for progesterone tomorrow so they are now going to do a full hormone blood test as I don't think the hospital know what's going on either!

Has this happened to anyone else?