I've had it several times recently. It comes on quite suddenly and quickly builds up to quite a severe pain, not strong enough to cry out, but strong enough that I won't be able to cope if it keeps going.
The pain is high in my chest, just left of centre. It radiates down on the left, to my stomach area, and centrally upwards through my throat and into my face.
A cold drink eases it almost instantly, but the ache remains for a long time afterwards, and sometimes flares up again after a few minutes/hours.
I cannot identify any pattern or trigger.
Any ideas what it might be? And should I worry?