CM and ovulation

So during my predicted fertile window had very light ewcm ... on Dec 26 I had a large amount in the afternoon and the 27th I had medium amount for a day or two after I had small amounts. I also had been tracking bbt and the predicted ovulation was the 28th. I wish I had done opk as well but any ideas based on CM when would my ovulation day be? I'm currently on CD 33 (last cycle this would be the day I had got my period) my cycles have averaged out to 31 days but over the last year has ranged 27 to 32. Also how long after ovulation should you get your period? And when and how quickly should temp drop if period is coming ? I'll share an updated temp chart