It actually wasn't really painful at all. Different places can do things a bit differently but the worst things for me were the injection to trigger the eggs right before the retrieval and getting the iv before the retrieval. I have a total needle phobia so I was kind of nervous about the injections but they weren't bad at all. The needle is tiny and you inject it into a pinch of skin on your abdomen or thigh which is pretty fatty. For me, I had to get over the idea of sticking myself more than the pain itself, if that makes sense. The trigger injection had to go into my backside so I couldn't do it myself, a friend of mine did it and I couldn't see it which I was glad for. I think you almost always have to have someone help you with the trigger injection, sometimes you have to go to the office to have it done. I don't think I could have injected myself with that one. I have this whole thing about watching needles go in skin, I can't do it. Can't look when I get blood drawn, that sort of thing. If you can look when you get an injection or blood drawn it'll be a cakewalk. If not, you just have to psyche yourself up a bit and remind yourself why you are doing this, take a deep breath and go. Then you'll see it's cake and the other times will be much easier. I was given some pain meds after my procedure but after the day of I didn't really need them.
Most pain I had was some occasional light cramping-ish feelings and abdomen tenderness. Your abdomen or thigh (depending on where you do the injections) may bruise a bit too. Do not use the exact same spot twice in a row. Don't do anything super active the day of the retrieval. Perhaps not the day after either. I ended up going to a party which was probably not the best plan but there was no way I was missing it. I sat around for most of it but I was alright.
Good luck with your meeting on Sunday! If you'd like any more advice or someone to talk to about all this as you are going through it, my email is: firstname.lastname@example.org If you don't mind me asking, what made you decide to be a donor?