It sounds enough like anxiety to see a doctor IMO. Palputations and increased heart rate are both classic symptoms that many people with anxiety suffer from. I certainly would not worry about sounding like a hypocondriac if/when you see the doctor; the more information they have about how you feel etc the better their dx will be. I find so many times that people don't see doctors because they think its something of nothing when really they know deep down that there is something amiss.
Let us know how you get on. We are all here to help and support. (And trust me, there are lots of us!)
Im glad that things are moving forward and that you sound so positive about it! Hopefully it wont be long now before you get a dx.
All the best