Hello. I Have Questions Regarding My Period. I'm Very Regular

Hello. I have questions regarding my period. I'm very regular and always have been since I started my period. I get it very day on the same month and last 7 days. However there are concerns, I had sex a day before my period was due. It came 3 days and started off regular. As each day passed I bleed less. To a point when there was just little bleeding. Now I have no blood on day 5, yesterday I was bleeding but not on my pad. Just when I wiped after peeing. It was very mild.