Hey, Worried. I feel for you. Ask your doc if the hydrocodone dosage can be increased. I took half of what I could have taken my first few days at home, but I was just uncomfortable more than I was in actual pain. If he has not told you to avoid any other pain killers like Aleve, etc., take one of them to start, but if you have been told not to do so, don't self-diagnose here.
Get in bed and lie on your back (I'm a stomach sleeper here, so if you are, too, it'll still work for you). Hook your bag to the bed rail. Put in a DVD that you have seen before that really entertained you. Part of what is going on is that you have been psychologically traumatized as much as you have been physically invaded and a big portion of your past self is not there any longer. That surgery is a really, really invasive procedure even with the robot and a skilled surgeon at the helm. Don't underestimate the subtle psychological drama you are feeling. It's both valid and real.
Part of what will help you to get some sleep is to take control of the emotional mess boiling around inside. Every one of us who has had that procedure has some measure of fear going on in our heads right after surgery, and those who say they did not are liars, truth be told. So much is new, so find some ways to be good to yourself. I had to distract myself intentionally for the first few days, but as a result, I slept fine. You know where your "happy places" are, so you have to decide to visit them. It sounds silly in a way, but the mind has as much control over this transition as the body does. The energy expenditure on distraction ironically also distracts you from the discomfort and stomach gurgling.
First see how much hydrocodone you are allowed and be sure you are on the maximum allowable, but don't neglect your own ability to control what you allow yourself to think about. RIGHT NOW--you need rest more than anything. Your body has gone through a major trauma, and it has a longer-than-you'd-like road to recovery. Patience and support from your loved ones is a big, big deal right now, too. Do not be a hero and try to do things that are beyond your ability. Above all, if the doc says for you to walk around, DO IT. No matter how crummy you feel, DO IT. It's amazing how much that begins to help.
I'm not much help here, but as a "mind over matter" guy, I can tell you what worked for me. That catheter is a total inconvenience, your abdomen feels like raw hamburger in places, and your entire peritineum aches--right? Decide who is going to win--and don't let it be them!
Peace to you, man!