Can I get pregnant having unprotected sex three days out of my four day period? I am now at day 13 of my cycle, close to when I should be ovulating but I have had 3 times that I all of a sudden uncontrollably feel the need to throw up. I hate throwing up so I have held it in. I have also been having cramps on my calf muscles at night during my sleep. It could just be all in my head, but if there is a possibility I would like to know about it. My cycle isn't all that irregular but doesn't come every 28 days, it varies from 32- 35 days. If this has happened to any mothers please let me know your story.