i have like almost the same thing and my doctor said that i have supraventricular tachycardia. then i went bace to the doctor for a check up and it was worse so he ran some tests and said that i have becker muscualr distrophy.
i mean to like scare u or n.e thing, cause muscular distrophy is like not the best thing to be diagnsed with, but mabe you have tachycardia like me.
ok, so i dont have the pain like u have but i have the same breathing thing and the same thing happens to me at night, and yeaa we have almost the same things. my doc did a few heart tests and he said that my heart was goin waaaaay to fast (the avrage beats per minute is 90, mine is 180) and that is why i was haveing breathing problems. that is called tachycardia. the type i have is supraventricular tachycradia.
ok so i went bak to my doc like 7 months after i was diagnosed because it was getting worse and he gave me like a bunch of tests and the he said that i have "becher muscular distrophy"
that makes sence because when you have muscular distrophy (MD) your muscles weaken and eventually do not work well. so my heart was weakened and my lungs where weakened. so therefore i had a hard time breathing.
there is liek alot of other syntoms that comealong with MD like leg musle weakness, etc, so if you have any questions with MD or tachycardia the you can message me or soemthing. mabe you should also look them up on the internet.
wow that was a long message but i hope it heps,