Have I developed a Heart Problem?

Before I go to the Doctor I would just like to have a few possible pointers please.

Over the past 2 years I have encountered huge problems at work, losing alot of money in a failed investment and earlier this year losing my established business, leaving me practically penniless.

I have been very stressed but over the last few days, since Monday Ive been getting very odd sensations and pain in the chest, especially the heart area.

On Monday I started feeling dizzy, I woke up feeling uneasy, had a shower, ate and went out, all morning I felt so dizzy, then my left arm began to hurt, I have a numbness in the palm of my left hand and also sharp pain in the soft part under my elbow. I also had a pain in my left collar bone.

Whenever the slightest thing stresses me, a pain in my heart area flares up, it could be mild but if its something that really stresses me my chest gets so painful. I made a mistake on something yesterday and I got so stressed everything, my left arm and chest flared in such pain and the dizziness felt as though I was spinning in my chair. After that attack my chest hurt all day, even to touch, it felt like Id pulled a muscle.

The same thing but not as painful happened a few days earlier whilst in the garden, I started to get stressed and the dizziness really hit me.

This morning I was a little stressed about something and my chest started hurting but a very small dull pain.

Im quite worried, can I have some pointers please, i know nothing can be taken as diagnosis or treted as medical advice but I would just like some possibilities before I head to the GP.

Thanks in advance.