Sorry to hear that it didn’t work out like you wanted, but I’ve read about other people having the same problem, and one of my doctors told me that they have that happen a lot. Sometimes it’s just your body remembering how things work, and other times it simply comes down to anxiety. We want so badly for everything to work out that we end up causing shy bladder syndrome.
Keeping the catheter plugged and allowing the bladder to naturally fill up can sometimes cause the brain and nerves to remember how everything is supposed to work. Running some water in the sink or shower can help too, creating some nice background noise to help things along.