You're stressed, and you can feel your heart "skip" now and then....
Again, get it checked out just to be sure, since there is a family history of high blood pressure. But... MVP is most likely NOT what you are experiencing. The symptoms you described would probably point to palpitations (PAC - premature atrial contractions, or PVC - premature ventricle contractions), neither of which are usually dangerous.
I'm guessing you ran a search for your symptoms and came up with MVP? It's a possibility, but unless there are other symptoms you haven't described I'd be suprised. Try a search on yahoo health or web MD for palpitations and read the symptoms...
Verify it with a doc, but you're probably a healthy 25 year old