Heart Problems or Stress?

I have been very stressed out for a few months. I am a 22 yr old healthy male with no family history of heart problems. I went to the doctor about palpitations and my heart feeling weird. They did an EKG, echo and the lot...everything came back normal except a very slight MVP. I dont know if this is a combination of stress and anxiety but sometimes it feels like I am having symptoms of a heart attack... for instance... feeling a slightly bit lightheaded. maybe the smallest amount of a different feeling in my left arm, and my heart feeling kind of different. I dont know what to do because all of my tests came back very normal. So, is it possible that those tests missed something and there is actually something going on? Or is this most likely just stresss and I need to chill out?
Thanks

[CCF HeartMD6]

Unfortunately, it is very difficult to say exactly what is going on just be description of symptoms alone (and over the internet).  However, given your young age, normal EKG, and relatively normal echo, I would be reassured that it is unlikely something serious was missed.  MVP has been described in the literature of having a connection between anxiety disorders -- which can often manifest with similar symptoms.  However, if you hare having any change or worsening symptoms, I would suggest you follow-up with your physician/cardiologist for further evaluation.