I got that from over-vaping once. I was trying to do a long drive late at night and had no caffeine, so I vaped myself silly trying to stay awake! Water helps everything. If I'm planning a long chain-vape I try to drop down in concentration.
You're probably fine, but always check with a professional in the medical field of course. I had one overdose incident with a defective 3-piece ecig once, and the initial super buzz/dizziness was soon replaced with severe nausea and a feeling of doom. V4L's design prevents what happened, and I use them the most now