Most people's average time between ovulation and period is 12-16 days (there are people outside this range of course). How long is your cycle? If it was a shortish cycle, that could definitely be ov pains.
Although, I often get an ovary-twinge towards the end of my period but don't ovulate for another week or so.
I have been keeping an eye on my ov signs the last 3 months and they seem to be appearing between 8-10 days after period starts, so thinking I am ov on day 10-12 depending on the month seems to be 10 one month then 12 the next, glad I am keeping an eye now and a record of it as hoping to start trying towards end of the year and would of just auto tried around mid point.
I had an ultrasound scan which came back that my ovaries were polycystic, but I understand there is a big difference between that and PCOS? The gynae was totally not bothered by it and said it was quite normal for someone my age.
I do feel that something is not quite right hormonally.