Black hole

I lucid dream pretty regularly and have performed a few astral projections also but in the the last few months stopped trying to astral project due to very weird astral entity experiences. Anyway i seldom get scared or weirded out in dreams but a few nights ago i was going in and out of lucidity in a dream and this bugged me because i wanted to stay lucid very badly. Im not sure what happened but i got transported to a place and im using the word place very loosely now... A place which was very dark but at the same time filled with flowing colours. I was not constrained to a body and felt I could almost swam between these colours. It was very easy to stay lucid in this "place".
I remembered reading about asking for a spirit guide to come and talk with me while astral projecting/dreaming so I did. As soon as i did this the weirdest thing that has ever happend to me in a a dream took place. I instantly felt like I was being forced into a tube or a pipe like thing with a sucking force. It felt very uncomfortable. It was very dark and time felt like it was passing fast. Would also add I felt the presence of a entity but could not say if it was dark or not. Woke up very freaked out. Dont know if anyone has had a similar experience?