Period on the pill

Started Aubra a few months ago I'm finishing my third pack. My periods have been later than expected and a lot lighter, too. I used to have SUPER heavy periods. My period started yesterday evening (day 5 on placebo week) and it's over today. A few days before my period, I started showing signs of ovulating (clear runny mucous ect)... It's still happening now. I had sex like a week ago. We used a condom, so I wouldn't worry normally but with my period being so abnormally quick and light, I'm worried. Is it normal to have this quick and light of a period?