Sounds like garden-variety panic to me. Please note that p anic attacks do not have to be related to *anything* that is going on in your life. It often seems to be a completely independent function of your nervous system: For some reason, the nervous system goes on 'high alert' without any good reason. And if you were able to interview other members of your family--and if they answered honestly--you'd probably see a family tendency.
The good news is that panic is treatable. It may require some medication and a bit of talk therapy, but, boy, is it treatable!
Ask your doc for a referral to a shrink or a counselor. Your life will get better.