What Causes Abnormality In Breathing?

hey! the last 5-6months i had problem with my breath after eating some food! problems to breath normal, and a form for pain in the heart after strong food! i have also had som pain in my leg, and have been very scared when i go to sleep! the symtom is worser when iam trying to sleep! many symptoms happens in my body. My doktor in norway dont understand me i feel, and iam feeling very disapointed on that! i hope i not have a dangerous sickness, but iam scared, iam just 20years. my pee is not normal, it s very slow and i dont understand what happens! hope you can answer me and help on the way to feel fit agian!