Trying to get pregnant

Hi all been going to gym for 6 weeks now have lost nearly 9kg. Question is I am 30 both me and my fiance trying for another baby this 12month trying. Losing weight see if helps get pregnant. My periods have been irregular since coming of pill August last Yr. I go to gym 6 days a week. Only have very light period this month. Question is did anyone else get preg with irregular periods and going gym 6days week and doing classes to.