Severe constant pain in last molar a week after new tray - no dentist at the moment. Could aligner have loosed crown? (photo)

I'm 36 and my general dentist offered a refund after admitting that he didn’t review my case before sending impressions on to Align. But 4 days into tray 3, the worst pain began in my back molar (crowned and all teeth missing around it). Pain intensity has steadily increased into week 2 of tray 3. I never opt for dental gas and only took Tylenol for multiple extractions, but I’ve been taking Aleve 24/7 for this throbbing pain. What could cause pain so severe in only one tooth? Loose crown?