I Need Help!!

So me and my husband have been trying about 3yrs now. He has 5 kids so his swimmers swim good! My cycle is very very irregular, I missed months at a time & the highest ovulation percentage ive had this year is about 37%. I was told I need at leady 60%? I also was told I should try taking Geritol? Has anyone heard that? What do you ladies think? I never post but  i almost want to give up & dont know what to do...