Me and my partner have decided to try for a baby, I was on the mini pill for a long time and came off it 4/5 years ago long before we got together. My cycle is really irregular still, how do I get this back to normal? I never know when I've got that fertile window, I've been documenting it, and other doesn't seem to be getting better. Sometimes I'm really heavy, sometimes I'm really light or I miss a period for months... can someone shed some light on this? Do I need to see my GP?