Irregular with a goal to get pregnant 🌎

 I’ve had irregular periods since I could remember. It’s sucks cause I have been to the hospital more than 8 times to get a blood transfusion cause I was losing so much. Now I’m healthy, lost over 95 lbs .

I have the best healthiest relationship god gifted me with and let’s just say we both really want a baby.( he a twin with his sister ) so hoping I get luck and get twins since I’m also next in the generation line for twins .

Question/advice?:

How can I get pregnant being irregular?

What do I need to do to like diet , exercise and etc wise to help me achieve my goal?

What if my partner has a bad habit cause that affects my chances too?

(He smokes cigars daily and drinks 1 can of spiked tea with his friends on a daily after work)

What position are the best to get pregnant?

How long do I wait when he releases in me before getting up and washing up ????

I need some advice badly. I take plus happy hop-ha pills and B12 , what more do I need… I’m willing to do anything for this goal.