2nd FEC Racing Heart?

Last Thursday I had my 2nd FEC. I was also given Neulasta to self administer on Friday. Ive had a little nausea + some flushing (inj side effect ) Today though I’ve wakened with what seems to be too much adrenaline pumping through me… also given half the a chance I could bite someones head off!! Is this normal?? If I move around it only seems to exascerbate matters . Please any comments or advice.
The thing is other than this I feel perfectly well.but definitely ‘wired up’
Is this normal?