Ovulation Bleeding

Hi all! Just wanted to ask how

common is ovulation bleeding?

This is my first time bleeding during

ovulation (also had very rough sex

2 says before ovulation bleeding)

and last week my period ended

and lasted 10 days which was

unusual for me and was very light

also. Usually i last 5-7 days with

very heavy bleeding. Also im in

nursing school and have been

stressed all year due to no breaks

at all and monthly exams. Can

ovulation bleeding happen every

month for some or just every now

and then?