Heart Health Unsure - Requesting Advice.

I have the following symptoms: 1. pain in one particular area in the middle of my chest when pressed on. Area of two finger tips. 2. General heavy/numb feeling in the middle of the chest 3. Arm (left or right) goes heavy, numb with slight pain. It's sort of like a feeling when an ice pack is kept on your arm. It's cold, slightly painful and numb. 4. I have redness at the back of my throat and it is constantly dry no matter how much water I drink. 5. I currently have a throbbing headache on the right side of my head. 6. I have pain on my lower back every morning and it's only when I bend. 7. I have dry cough occasionally 8. I have a resting heart rate of 80/min. 9. I am overweight - 5"7 at 95kgs. Have started walking an hour and  diet of more fruit juices, Veg &less meat, no oily/fried food. 10. I used to smoke about 7ciggarettes a week. I'm scared I'm headed towards a heart attack or something. I think I need immediate advice. Please assist in what should be done in terms of tests etc.