I've checked my heart, it's fine.

I went to Bedok polyclinic with mum on Saturday for a body checkup after the terrible chest pain I experienced a few nights ago.
I took an ECG test, to check for abnormalities of heart rate. The test results turned out okay, but the doctor said that it will be safer to get a more detailed checup, so he referred me the A&E of Changi General Hospital.
I felt perfectly fine at that moment, and probably was the healthiest-looking patient in the clinic, yet he referred me to A&E! And it's immediate!
Not say I broke my foot or got burnt by fire, why so serious and A&E?!?
So we went down to Simei, had lunch and went to CGH.
At CGH, I am again the healthiest-looking person. The other patients were either in wheelchairs, have bandages here and there, or look very very ill. There, I had another ECG test, and similarly, results showed that I'm in the pink of health.
Then, the doctor at CGH told me that my heart is fine, there's nothing wrong with me, and that my heart and chest pains I've experienced are stressed-related.
??????
You mean the gruelling pain I've suffered is due to stress? What stress do I have when I'm not studying? I am practically stress-free and enjoying every bit of such carefree life now!
The doctor insisted that it's just a mental thing that's troubling me and causing me to feel the anxiety that led to chest pains. He even said that the next time I have an attack, he'll refer me to a PSYCHIATRIST.
Okay, so now you're telling me I'm mentally unstable after not being able to test out what's wrong with my heart?
I feel totally cheated of my money, it costs around 100 dollars in all for consultations and ECG tests at both polyclinic and CGH.
And after so much, you say that I'm phslysically healthy but not mentally? Argh.
The more I think of it, the more irritated I become. This thing is indeed driving me nuts!
But well, I do feel relieved now, knowing my heart is okay. I'm just a healthy baby who happens to think too much.