Angina at 26 - common?? deadly?? HELP!!?

Docs think I've got angina. I've been suffering from chest pains for a while now, and my mum decided to rush me to hospital one morning afew weeks ago because I'd been walking upstairs and went really breathless n dizzy with chest pains. The hospital rana heart trace which was fine, but told me to visit my doctor and ask him to refer me for the stress test where they hook you up while you're on a tread mill to test for angina. I did this - still waiting for a date from hospital - and my doc also gave me an angina spray. I've used it twice so far and its helped, but my friend told me that just because it helped doesnt necessarily mean I actually have angina. Heres my problem.. I also suffer with anxiety attacks, have done for the past 8years. I also suffer with terrible, vivid and horrifying nightmares most nights. Im finding it really hard to work out what is an anxiety attack and what is an angina attack. Im also having a hard time getting my head around the fact that I might have angina at such a young age - Im only 26!! - I've always been active, never been a heavy smoker, and as far as I know theres no heart trouble in my family (tho I cant be sure as Im adopted and only know my maternal side). PLEASE.. can someone help me out here with abit of advice or experience on the subject. As a single mum who lives alone with my daughter, I'm finding all this really terrifying to cope with and feel in complete limbo while Im awaiting this stress test.