help it's long but please read!!

madge
So I started my period a day early on sep 26th and ended on October 1st it's a full 5days and the 6th day it's just gone no leftovers no spotting it just stops but this month the 6th day after sex I started bleeding like red not brown and then like an hour later I had the worst cramps of my life an I get some bad ones well I only bled for a lil while longer and then from day 7 till day day 11 I spotted only when wiping (tmi) but it was just a very light brown but I've aslo Bn cramping just a lil but enough to notice an yesterday it was bad enough to take meds oh an I also Bn very moody an just not feeling good ??? Could it be some kind of infection or something I have an appointment but not for a few more days someone help