Ok so I've had sex for the first time in 2 years like 2 weeks ago. Is it possible that after 2 years finally having sex can mess up your period? I got my period like clots and all but only lasted for 4 days (not sure if this is one of those trick days or not). Like my period has shortened on its own before but I wasn't sexually active for 2 years. I guess I'm just wondering if my body can be readjusting since the 2 years has ended or is that something that just happens? I also would say I have irregular periods and I have been coming to an end of a semester at school. Can it also be stress?