Posting what make/type trailer you have and which type of slide mechanism you have would be helpful.
On our Cougar, the living room slide stuck in as you describe. The clutch made its ratchetting noise with no movement. Went under the trailer and loosened the jam nuts on the bell stop and then loosened the bell stop about 1/8 to 1/4 turn. Slide went right on out. Re-tightened the jam nuts - never had the issue again.
Of course, that will only work if you have the rack-and-pinion type mechanism.
Jack & Marty
2018 Laredo 298 SRL
2011 F-250 SB Crew Cab 4x4 6.7L