As it says in the subject really. Can sex make your period heavy? I didn't have sex for 4 years due to exH leaving me and me not wanting to bring back men when the DC might see them / find out. Went away for a weekend and pulled, had (incredibly good) sex, this month AF came a couple days early and has been accompanied by the most agonising cramps and has lasted a week! For years and years it was 3 days heavy flow maximum, this time it has been 6. Is this a coincidence or is it A Thing? If I google I just get advice about bleeding immediately after sex which isn't what I am trying to find out about. I just want to know if the two things are linked.