Pregnancy and Ovulation

My periods are usually 26-27 days long so last year, October 6, 2019 I was supposed to get my period that day but it never came so I waited the next and another until I was finally ready to take a test, Id usually get PMS symptoms before AF but that time I didn't get any at all which was strange to me so I took a test and it was definitely positive, sadly I miscarried at 6 weeks in December, and it was the one time I didn't track my period&ovulation so can someone give me an estimate of when exactly did I ovulate at that time? I would usually get PMS symptoms around this time I'm 9DPO and I have none at all yet but my period is still 9 days away I wanna wait to see if I get any.

Good luck to me.