Were you ever a smoker? If so, how many packs per day, and what brand/strength?
Chest pains are highly uncommon and not a side-effect of vaping, nor an indication of allergic reaction. If you were never a smoker or user of tobacco, using any e-liquid that contains nicotine is not recommended or advised.
What device are you using (battery/tank) and what brand/flavor of e-liquid are you using?