It is unlikely that these symptoms represent a heart attack, especially given your young age. With your heart racing, you could be having an arrhythmia that is causing dizziness, nausea, and chest discomfort. It wouldn't be unreasonable to see a doctor and wear a Holter monitor to look for an abnormal heart rhythm.
When in dought usually get checked out I to have anxiety a few heart problems I usually take a xanex and wait a few for it to kick in if I'm still in pain I go. Right now I'm actually debating on going my left arm I s tinglly I have a bad head ache and a lot of palps. But who knows when it really happens. There's now harm in getting checked out
Sorry didn't no this was expert forum