I have never been late on my period(always had a 28 day cycle). I had intercourse Sept 22, and was supposed to get my period Sept 29, but I didn't get it till Oct 4th. A few days after intercourse I started getting period like symptoms so I thought I was going to get my period, so it was weird to me that I didn't get it till the 4th. On the 4th I had light bleeding, and on the 5th it was really heavy, and since then it has just been really light. Could this mean anything? Before I got my period I really thought I was pregnant because my body was feeling different, but now that I got my period I am confused on what went on.

Sounds like you had an irregular period. We all have them at one time or another.