Cries out at night


My son has been sleeping through the night completely since he was about 8 months old. We typically never hear a peep out of him. This last week around the same time each night he cries out for maybe a minute and then goes back to sleep. It scares me every single time! Has anyone else's little one done this. Is it bad dreams? Teething? I hate it for him and tbh for myself. Being jolted awake by a scream at 3am is not a good time. Lol