I honestly just want to know if anyone else is going through this and can offer advice

Ok I have a heart condition and the reason it's classed as a disability is because I can't run for a certain amount of time without my heart collapsing and Me basically dying. ( Yes I have died multiple times but managed to get my heart going again) anyway basically im not supposed to sports, get a bf, have alot of friends, social media, certain jobs or even a family. I'm supposed to go to school come back and rest. Anyway the reason I'm ranting is because the thing that gets me is that I can barely kiss a boy without my heart being a dick. I'm scared to have sex for a long time incase my heart has too much adrenaline anyway so this basically means I can never have children. Or a pregnancy because the stress of the pregnancy and then the birth would be too much for my heart. Yeah my heart is getting stronger but it still sucks because every month I'm reminded that I can have children but I can't that no matter what I won't be the same and I honestly just want to know if anyone else is going through this and can offer advice x