Wanting to be a mommy

I'm 18 almost 19 my husband is 25. We were bestfriends scine we were little and liked each other then. We lost touch for a couple years got back in contact on my 18th birthday got together and got married three months later he was 24 then. We have been trying to conceive since we got together but he has a bad heart (had a heart attack at 19) so we can't very often and he has a 50/50 chance of even having kids. But here we are trying to conceive number 1! Hes my bestfriend and my soul mate. We will love each other even if we can never have kids!