A.L.
I had the same issue about a week ago with my 19 month old. She's always been a great sleeper at night (not so much with naps at daycare) and suddenly would wake up screaming in the middle of the night but go back to sleep within a minute or two. I didn't think it was eye teeth since hers are about halfway through as well but thought it might be the final molars since she has been chewing on things a lot back in that area. I really don't have any suggestions since after about a week and a half she went back to her typical sleep patterns with no disruptions at night. Hopefully things will get back to normal with you guys as well! Just wanted to let you know someone else out there was having the same issues and you're not alone in your confusion :)