I'm 18. I had i-pill on 4 th may and my periods ended on 3 rd may.in June my periods was in time it was normal and lasted for 4 days. But in July I've no periods yet. Few days ago when I again had sex it bleed a little for a while during sex and no more blood was seen after few minutes. I also had history of pcos and came over my delayed periods with medication few months ago. What might be the reason for my delayed periods now? Why did it bleed that way during sex? What should I do?