hi it may be a good idea to see either you doctor or gyno get your periods sorted out and try find out if your releasing eggs you should find that ovulations day is day 14 of your cycle give or take a day so having unprotected sex 4 or 5 days before makes sure his sperm is there awaiting your egg the length or your cycle dose not really come in to it but see what your doctor or gyno says. hope this helps you. good luck
14 months after mirena removal still have irregular period cycles. i had a completely cycle of mirena (5 years) and had another placed for additional 18 months. october of 2014 we decided to start trying again. it's been 14 periods since then and my cycle varies 25- 28 days long. sometimes the cycles will regulate for a couple months and the next month will be a couple days short or a couple days late. i'm getting worried about not being able to get pregnant again. is this normal someone on an iud for almost 7 years? . thanks