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I had this procedure about 6 years ago and felt exactly as you describe. I went back to work after 2 weeks feeling fine, and had to have half a day and come home and sleep. I was only 25 and fighting fit at the time, but it really knocked it out of me.
I think it is natural to try and get back to normal and it is your body's way of reminding you to slow down.
My friend is facing a surgery and a consultant on checking his history (5 ops with GA) expressed concern on numnber of GAs he had and gave him extra checks (ECG etc) as apparently GA does have some possibly cumulative/long lasting effect. He has just been given OK for the surgery.
I hope someone can come to explain how exactly GA affects the body, as I wasn't aware of that and would be interested to find out more.
Keyhole surgery reduces the trauma so you will get over that very quickly. GA's take ages to work themselves out of you system and the effects linger much longer than the surgery itself. I felt like I had narcolepsy for a couple of months. Just allow yourself frequent rests, regular nutritious food and it will pass soon enough.
I've had a GA three times and every time my body goes into shock and my metabolism goes into overdrive. I end up losing ridiculous amounts of weight. After a simple op to have my appendix out I lost a stone in two weeks and felt dizzy for a month. Horrible
take it easy as some others have said - you'll still be healing inside and the drugs they used (GA and painkillers and stuff) take time to come out of your system so eat well, drink plenty of water and rest when you need to.