Can you give some more details, please? Like what you mean by chest cramps, which implies muscle spasms. Chest aching can be a juice issue. What exactly are you
vaping, composition, nic level, what PV are you using, what wattage, etc. As many details as you know.
And if this really is cramping,
vaping does not cause this, as far as I know. I've not heard of that anyway. Heaviness or aching, that's a different story. But we are in general not medical docs here, so if it persists, I would see a physician.