I have started to have a sex my bleeding started and get stop after some time so I had sex continue up till last long. I have a doubt that my first day of periods and I have done a long time sex. So it can cause me cyst in my stomach or I'll b normal please reply must doctor and now I have a whole body pain plus headache and I didn't get my periods dos time at a right time. My period date was 15sept and now I have my periods on 5oct but I got bleeding till sex time now I don't having a bleeding n it's cause a lot pain.