Hello, I'm a 22 year old female & for the past few weeks my life has been a living hell.

I went through alot of stress in 2009. I missed a period in March which caused some worry & got sent for a blood test to see why & it turned out that I had Polycystic Ovarian Syndrome [PCOS]. & Since then I haven't really looked back. There was alot of worry over Gyno appointments, ultrasound tests etc.
Also, at the same time as going for the blood test, I got sent for an ECG because I was complaining of my heart beating fast/hard. That seemed to come back normal according to the doctor.

Things also haven't been that good in my personal life. Because of all I went through last year, I've alienated myself from most of my friends & barely see anybody anymore. But I'm best mates with my sister who lives with me so I'm not completely alone. But my family life is abit stormy, there's always some s*it going down & alot of arguments. It's been like living in a war's zone sometimes!
I also have been unemployed for some time now which has depressed me abit...

Then in November 2009, my cat got ill, she's quite old & we've had her awhile, since I was little & we are all very attached so that was a stressful time too.

Then at the beginning of december I noticed my heart beating fast/hard again & feeling abit unwell...so I went back to the doctor who said my pulse rate was 120bpms! He sent me to the A&E straight away for an ECG.
Being at the hospital was an horrific ordeal, they kept me nearly 6 hours whilst they run tests. They did two ECG's, the rhytm was normal on both, the first one was 120bpms & the second one was 88bpms. They did blood work & apparently everything was normal & they sent me home. But since then my anxiety about my heart has been through the roof!
It's got steadily worse, i've been in hell with the worry & I went to a walk in centre yesterday...temperature was fine, blood pressure was fine, heart rate was 120/130bpms but decreased slowly whilst I was there like at the hospital. Passed me off as anxiety again. Although I KNOW it's not that...
I'm going back to my GP tomorrow for the results of a thyroid test...
I've kinda already resigned myself to the fact that I'm gonna die soon because of this, I know I'm heading for a heart attack & no one will listen to me! PCOS increases risk of heart attack, why can't people see that?
It get's worse when I move, I'm getting ringing in my ears, chest pains, vision problems, headaches, dizziness...I know it's coming but no one will listen...

Has anyone any advice?