Omg Ann, I am just now seeing this. I experienced something very similar the other day with Lilly. It started out as a "reverse sneezing" episode but she wouldn't stop. I was horrified. Everything that I usually do to get her to stop wasn't working, I was crying but still trying to stay calm so I wouldn't make her nervous. Her body got so stiff. Finally, I kept screaming for my mom and she came in and helped me calm her down then she was fine. I didn't pay attention to her nose to see if it was dripping or anything but as soon as I read your post I was like... OMG cus it sounds EXACTLY what I went through with Lilly.
I'm so glad he's ok though, bless his little heart.