Waking Frequently

My 14 week old has no discernible problem

But keeps waking up roughly every hour screaming and crying hysterically. He normally sleeps through the night. Not hungry. Not gas pains. No fever or obvious source of pain.

I’m at my wits end and not sure

What to do. My husband has surgery first thing in the morning and I’ve gotten maybe 20 minutes of sleep. Should I be concerned ?