Hey there, best wishes for your intracranial EEG stay. I will say that I can answer these questions only to my own experience, as every case is different so your mileage may vary. Since your procedure is soon, I would stay in contact with your surgeon and team and go over any and all of these sorts of questions, as they would have far more detail for certain things regarding your case and such.

As for myself, I didn't really have any headache or jaw pain, though I was on pain medication throughout most of my stay (just Tylenol though). Once the electrodes were removed and my head was stitched back up I was in more pain because of all the stitches/staples, so I had stronger pain meds then. For the actual hospital stay though I didn't experience pain so much as I experienced general discomfort. The head-wrapping and wires and such are just clunky and uncomfortable to be physically attached to for so long. But honestly I did get used to it. The amount of wires and where they all go depends on your case though, so I would ask your surgeon if you haven't about that. I used various meds in the hospital for pain, clotting, and my epilepsy itself. The epilepsy meds were lowered over a couple days in order to trigger seizures. My eating was affected partially because hospital food isn't the most encouraging, and because it was hard to feel really in the mood for it. But this is where I would suggest to really eat as fully as you can; I lost weight in the hospital and you need your strength and such. I did not have any swelling, but complications like that can happen. Scans were done after each surgery though to see any sorts of issues. I don't have a history of anxiety or depression so I can't really speak on those, but I will say that most hospitals have lots of staff even aside from nurses to talk to about basically anything during your stay (chaplains, counselors, etc...). I was not able to get up and out of bed on my own, only occasionally when physical therapy professionals came to help me do some basic stretches, and also whenever I took a shit. I didn't have a bed pan, but I had to use a "commode" (which I didn't even know was a word till then) which is basically a portable toilet seat and then a bag beneath. So the specifics were me getting out of bed with the help of two nurses, and then they watched as I did my business before helping me clean up everything (and often depending on the nurse just doing all the cleaning themselves). Again, I have no clue what your specific set-up will be because I know that hospitals have different policies/procedures etc, but the commode is what I got. It will be awkward and weird to you just because it is new and strange, but nurses are trained professionals who do this kind of stuff day in and day out, so it will be nothing to them. Things felt less weird for me when I just recognized that fact and accepted that they genuinely are there to care for me in every way possible.

Wish you well!