The bottom line is - you still did your job. The man was treated in exactly the same way as anyone else would be in that situation. The fact that you were feeling crap and you 'slipped' as you say didn't hurt or affect anyone - least of all the patient who was prob too comatose to notice. You are not superhuman and everyone has their good days and their bad days. That is normal. You are prob more paranoid about a potential complaint because you aren't feeling 100% physically - jet lag can really change your mood. Try not to worry about it if you can.