This bathroom is hardly used. Went into bathroom and shower trap was pushed up and what looks to be toilet paper and feces now in shower. No other bathrooms have this issue. Everything in house seems to be draining properly. May have happened with in the last day or two. Any suggestions?

That is what you would expect in the lowest bathroom when you have a partial blockage. Other higher baths flush into the lower bath. Have the main drain lines cleaned.

shower trap was pushed up please explain. Are you saying that sewerage came up out of the trap?
You have a blockage downstream from the shower.
The solution would be to snake the drain line. This can be accomplished by performing the toilet and snake from there or snaking from the lavatory roof vent. If you snake from the roof put out enough snake to reach the base and 15 put more. Good luck, Tom