Okay so my period started a whole 15 days early right, but it was very light/ medium. Normally my periods are really heavy. I was okay with it but then again I wasn't because i felt like there was blood sitting inside of me that just wasn't coming down. Anywho, my period went off. I normally wait two weeks before I have sex with my partner again but this time I only waited four days. We had sex yesterday night and today I started to have these mild cramps. I didn't think anything of it until I used the restroom & seen this heavy stain of blood in my panties. This has never happened to me before, so is it common to bleed four days after your cycle? Is it possible sexual intercourse could have started it up again & is it okay to start your cycle 15 days earlier than usual? I am freaking out honestly.