What should i do?

So i'm 16 years old and just 2 months ago i was a perfectly normal kid. I ran track (quite well) and lead a normal life. And then i came down with a cold/allergies and all of this anxiety came along with it. For the last 2 months I have been completely sure that i am going to die. First it was my heart so they did an EKG and found a small, but not uncommon, abnormality. Then with a persistent throat tightness I went to a different doctor. Who then diagnosed me with acid reflux and have been on Nexium since. But my anxiety and throat issues persisted, so again I was brought to the doctor. Where they did a CT scan because the doctor said i had a "shotty lymph node". The scan came back saying it was indeed enlarged and the doctor had told me it was just at the limit where they start thinking about "bad" things. He said it could be normal but they have to run tests to make sure its is. I am still freaking out. I havent gone more than 5 minutes at a time without thinking about it. I'm gripped with this inevitable fear of dying. Thousands of questions just race in my head. What if I'm dying? What happens if I die? Is it going to hurt? But at the same time I dont even know if there is anything wrong. But if that were to be true that why would my throat be bothering me. And the scan come back with a supporting problem? Please help at least giving advice, i cant keep living like this. I haven't been able to enjoy any aspect of life. Sleeping, eating, running, or anything for that matter has been ruled by this uncontrollable fear and worry.

[mammo]

Hi, I know this is scary, but try not to worry until you truly know that there is something to worry about.  Acid reflux can keep your throat sore, it causes stomach acid to come up into your throat which then irritates your throat making it sore. Acid reflux also can make you feel like you are choking, especially while eating. You and your mom may want to look into Prilosec for this in place of the Nexium.  Lymph nodes can enlarge for many reasons that aren't serious, and they shouldn't even be saying what they are at this point.  Once anxiety sets in, it takes time to overcome it, and now you are worried about your health which is just feeding your anxiety. Fear feeds fear which feeds your anxiety.  You're at a point with your anxiety where you need to seek help with it, and often at your age therapy is enough. Talk to your parents about this, in therapy you can learn how "not" to dwell on things which will ease your anxiety.  Take care....

[mammo]

Hi, I know this is scary, but try not to worry until you truly know that there is something to worry about.  Acid reflux can keep your throat sore, it causes stomach acid to come up into your throat which then irritates your throat making it sore. Acid reflux also can make you feel like you are choking, especially while eating. You and your mom may want to look into Prilosec for this in place of the Nexium.  Lymph nodes can enlarge for many reasons that aren't serious, and they shouldn't even be saying what they are at this point.  Once anxiety sets in, it takes time to overcome it, and now you are worried about your health which is just feeding your anxiety. Fear feeds fear which feeds your anxiety.  You're at a point with your anxiety where you need to seek help with it, and often at your age therapy is enough. Talk to your parents about this, in therapy you can learn how "not" to dwell on things which will ease your anxiety.  Take care....