How do I know I'm ovulating?

I have had irregular periods for years. I have struggled with multiple eating disorders for 6 years. My period would stop for up to 8 months come back disappear. I have tried very hard to get it regulated. I eat dates, blueberries, oranges, spinach. I want to be healthy and have children. I'm a healthy weight, but I've been trying for so long I'm scared. I can't afford to see a doctor right now.. I've finally gotten my cycle within a 26-28 day range, but cm is supposed to be clear and mine looks white. Me and my boyfriend are trying but I think I'm broken. I've had 3 miscarriages. Ive been off my period for 4 days and I'm breaking out I'm depressed.. I need help