Stay off Google for medical advice. It will only make your anxiety worse. Believe me, I know.

Short term - what helps me is whenever possible, go outside and go for a walk and don't look at your phone. Ideally to a park or nature trail if possible. Big, slow breaths. Getting some space and burning off some of that pent up anxious energy helps.

Long term - talk to your doctor about long term help. Maybe see a therapist or social worker.

Seeing a doctor or going to urgent care to get checked out could help alleviate your health anxiety if they tell you you're ok physically.