Bobby,

Your heart rate may just be high due to anxiety.
And you may just be feeling weak because of the depression right now.
Please try not to get ahead of yourself in thinking you have a heart condition yet. A lot of this testing could be precautionary

I really wish that you were feeling better in all ways. I want good things for you

I'm sorry that your nephew hasn't written back yet. It does take some people a while to respond to emails. I hope that is the case