Missed period & Irregular cycles

I was on the pill for 6 years and got off of it in Oct. I had regular periods the first 2 months after getting off of the pill. Since then my cycle has gotten longer each month, last cycle was 44 days long. My dr says there’s a chance I have either Endometriosis or PCOS that could be causing it. Now I’m on day 52 of my cycle and no period. Not pregnant, just late. At this point I’ve just convinced myself I’m not having a period this month. Anyone else experienced this?