I think once you have the catheter out you will breath a sigh of relief and things will rapidly improve. It takes time for the body to flush out all the anesthetic and medication etc. I was back at work after four weeks, I did have a nap at lunchtimes, after six weeks I was driving all over the UK but needed to take sleep breaks on longer journeys.
Tomorrow is your trial without catheter day, the expectation is worse than the actual event, the removal should be a painless experience, but can feel quite weird. Stay calm and relaxed and you will sail through the process. Twoc at our hospital involes removal of the catheter followed by drinking water in a "controlled and steady" manner and then having to pass two or three samples of urine, it can take between one and three hours depending on how quickly the water passes through. I have had numerous twocs and never failed one, I drink plenty of water (little and often) on the day. Listen to what the staff tell you.
Make sure you have some pads for the journey home, if you are lucky you will not need them. I always took a towel to put on the car seat just in case of accidents. Getting in and out of the car can make you leak as can standing up.
My first catheter got stuck on the way out, a senior nurse came across and gave it a quick pull out, no pain, but my surgeon blames that for my ongoing stricture, if it gets stuck get a consultant involved , he spent a long time sewing your urethra back together.
Hope all goes well best wishes.