I had a lap on the 24th for suspected endometriosis and secondary infertility.
It's keyhole surgery and fairly straightforward. Theyll have a good look around and probably put some blue dye through your tubes to make sure that there's no obstructions. They might also take a sample of your womb tissue. How many incisions you have will depend on whether they do other things while they're there and what they find. For me, they looked around, checked tubes, checked for scar tissue, cysts etc in uterus, took womb tissue, got rid of a few bits of endometriosis - I have three wounds. One on my hip that is tiny and barely noticeable already, one on my c section scar which is tiny and only really noticeable as it's red from the old scar tissue, and a larger one coming down from my belly button. None of them were ever really sore, there's a few pulling feelings on the belly button one, but I think that's due to my own stupidity (accidently pulled on a stitch instead on pulling up my tights the other day!).
Mine was done in day surgery, although there was a bit of damage to my bowel during the op so I ended up being kept in for 2 days with that. I was told to take 2 weeks off work to be cautious, again it depends on what you're getting done.
The worst part about the surgery for me was the gas they use to inflate your abdomen. It was the most painful part, although nothing that some strong cocodamol couldn't control. Again it may have been worse than normal for me as they accidently put the gas into my bowel when they first tried to insert it. But what I hated was the nausea it seemed to cause. I hate feeling sick, and I'm not going to lie, the nausea did last quite severely for about 6 days.
The pre op was just lots of the usual medical questions about allergies, pre existing conditions, previous surgeries etc, plus height and weight and bloods. Theyll give you some advice about what to do on the night leading up to your op and what to bring with you, tell you not to wear nail varnish etc.
Hope this helps a little! I had a bit of the fear of the unknown with it but it turned out totally fine!