Have I Had a Heart Attack?

Hi all, please I need some advice. I am 24 years old and am currently travelling in Australia.

It may sound strange but I fear I have had a Heart Attack or something similar. My heart has always beat strong, I could feel it when I was lying in bed, I could see it when I looked down. However in the last few days it has gone very weak, it sounds strange but sometimes I even need to check my pulse to see if my heat is still beating.

Not only that but my finger nails have turned a purple/blue at the base, my neck almost feels swollen and sometimes it is hard to swollow.

I do not remember my chest hurting, though there has been occasions before this when my heart would seem to beat, beat, beat.............beat. Like it misses a beat, I'd then go light headed and have a sinking feeling in my stomach. I've only experienced this 3/4 times prior to this weak heart beat and not for a few weeks before I noticed my weak heart beat.

I had a dream once where my heart would beat rapidly and it felt like all the blood was rushing to my head. It sounds rediculous but I remember thinking in the dream "I'm dying, I'm dead" before starting awake.

Please help me, I do not want to have to cut my travels short and I do not want to go to the Dr cause it is expensive here. Do you recommend that I go anyway?

It's starting to worry me how weak it is. I never feel out of breath either...please help.