Does it seem like you have post-nasal drip symptoms?

When I sleep, it feels like my nose shifts slightly backward, and I often feel mucus stuck in my throat when I wake up.

My nose is blocked, and even if I try to blow it, nothing comes out and it remains constantly blockedㅠ

I went to the ENT clinic, but the doctor said it didn't particularly look like I was falling backward.

I think that even if it's not usually, the symptom of falling asleep might be a type of post-nasal drip.

Does anyone know about post-nasal drip symptoms or treatment methods?