The first part of your sentence is a list of symptoms that are mostly grammatically correct, but it should be structured more clearly. You might consider revising it slightly for clarity, such as:
"Inability to relax, unrealistic or excessive worry, difficulty falling asleep, rapid or pounding pulse, skipping or racing heartbeat, nausea, chest pain, dry mouth, and the feeling of a lump in the throat are symptoms I experienced."
As for the