hi i'm 16, over the last few weeks i've had some disturbing health decline that has got me feeling uneasy. A couple weeks ago I had symptoms of a heart attack, my chest was heavy and I was in excruciating pain with it, I ignored it. The day after I went to college as usual, I woke up feeling fatigued, sick and weak but I powered through, walking to my bus had me gasping for air when usually it's a piece of cake. When I got to college I felt okay, until my heart started racing and the chest pain came back, I ended up passing out and woke up with my tutor calling first aid. My heart rate dropped from 124 to 34bpm and I was advised to go to the hospital and my brother picked me up. The rest of that day I spent in bed, feeling nauseous and weak, chest pain continued and so did my heart racing. The next day I went to the hospital where they did an ECG and blood test, both of which came back fine and I was sent home. Since then the chest pain is still consistent yet now it is travelling to my back, neck, abdomen and jaw. I still feel fatigue and weak. My skin has been breaking out in hives everytime I shower and has been insanely itchy (I've checked it's not allergies to body wash) I've also gained 30 pounds in a month which usually gaining weight is near enough impossible for me. I've been a smoker since I was 11, I started vaping at 14 and I've quit in the last month. Not all of this links to a certain type of cancer or any at all but I have this gut feeling and it's eating me alive, what do I do?