How can I get Prego or conceive if I have irregular periods

Kiara
I've been trying to get pregnet for 2 yrs now...I've always had irregular periods like I'll get it one month then go on up to 6 months without getting my period...it's getting pretty hard cause I recently moved in with my bf and I'm feeling the pressure from his family to have a baby...so any advice on wat I can do...thanks