Hi. My chest feels tight. For past 2 days I have had neck pains intermittently and piercing paidown my right arm. Is this serious?

Angina. Forty is not to young for cardiac event especially if strong family history, comorbidities smoking, diabetes, high bp. Best to assume worst and see physician emergently and hope for best. The opposite approach allows for severe potentially life ending event or damage that can not be repaired.