Did you mention to your surgeon about the mucous? It is fairly common, when the rectum is inflamed, to pass mucous, and it is sticky and jelly like in consistency, just as you say. I too have this.
You need to conserve all your energy for healing, so if you are on mostly liquids, I hope that you are using Ensure, or something similar.
Do give a list of what you are using for pain, keeping your stools soft, etc. Then we can offer advice for what might help.
Is there no chance that your surgeon would have taken a biopsy for Crohn's?
Hope the pain is a little better today.