I am 35,endromisis stage 4,got late marriage. Done cyst removal Ot 2years back for chocolate cyst. From last two months trying for conceive. My usual cycle was 28 days and 5 days flow. But last month it stayed for 4 days and this month today is 3rd day and its very lighter. Even this month my cycle started on 24th day. Had periods cramps too. Now i am confused is this changes happening after doing intercourse or any other health issues. Or is it a sign of pregnancy? Please help. I am so tensed .