Has anyone had any experience with a luteal cyst lengthening their LP? If so, when did you eventually get AF?

Background: Cycles have been 30-35 days with a very consistent 11 day LP. I've been charting and I'm 13 dpo today. HPT negative. With DS I had a BFP at 11 dpo so I don't think I'm pregnant. Did some googling and apparently a luteal cyst can continue to produce progesterone which results in delayed AF. I also had sharp pains in my left ovary a few days ago for 2 days, so maybe it really is a cyst.
Now I just wish I could get my period and move on with this total mind-f**k of a cycle!!
Does anyone have any idea how long I can expect a luteal cyst (if that's what it is) to delay AF for?