I know you aren’t doctors but any guesses, experience or explanations to this would be amazing because it’s driving me mad.
I had a coloscopy on the 28th September for cervical bleeding. At the appointment, no bleeding,no nothing the lady said she thinks cervix has healed itself so jobs a good’un. AF came on the 13th of October and lasted 14 horrible days(v.heavy which is not usual). We are TTC baby no.1 (I have moscarried last year) and began using Clearblue ovulation sticks. Tests showed nothing the whole time I was supposed to be ovulating and finally turned positive Saturday(Day 22). We DTD Friday Saturday and Sunday and then on Monday I began bleeding again 
I bled until today but it was only very light flow with red blood. We also DTD 3 days in the week before if that’s relevant.
Dr Google is tying itself in knots with no real answers so please hit me with your premonitions, stories from friends or (preferably) real answers& explanations.