Hi there, I had a myomectomy nearly 8 weeks ago now so am happy to share my experience. I had 5 fibroids removed varying in size weighing about 1kg in total apparently.
Firstly I would recommend a nightie in hospital rather than pyjamas as you will probably have a catheter inserted post surgery that may stay in for 12 - 24 hours so pyjamas may get in the way. I actually wore pyjamas and it was ok but in hindsight would've brought a nightie with me instead! You may also have a drain inserted near the wound site to drain excess blood so again a nightie is easier. After the catheter and drain are removed, either is fine. Big knickers also help - so that they don't rub on the incision, mine was a 20cm horizontal cut on my bikini line although I know sometimes a vertical incision is made depending on the position and size of the fibroids.
I had surgery early morning and was up by the evening - just moving from the bed to a chair. The next morning I had a shower with assistance. I did feel uncomfortable and in pain mostly when moving but morphine helped! The morphine was gradually reduced after 24 hours as it affects bowel movements and as constipation is already a problem post surgery, they try and not exarcebate the problem.
Movement where tummy muscles are engaged do hurt, particularly sitting up/getting up from a lying position. I was discharged after 2 days but needed help getting out of bed once home. A solution I found on the internet was to tie a sheet to the bed to use as a rope to get myself up using my arms rather than my tummy muscles if this makes sense? This was something I hadn't really thought about pre-surgery.
I feel that I recovered quite quickly, yes the first few days were uncomfortable but things gradually got easier. After 2- 3 weeks I was able to get back to my normal routine and could do most things for myself. Gentle daily walking is important to keep moving. I found it important to keep up some level of activity post recovery but also ensuring I got lots of rest - it's a balancing act! Lifting anything vaguely heavy is to be avoided for 6 weeks. If at all possible, try and have someone who can look after you for the first few days at home.
I was quite swollen at first but this has gone down so I think you will gradually notice a difference in your waist size once the swelling goes down.
All in all, I had a positive experience and now nearly 2 months on, my scar has healed well and I feel more or less back to normal. Please feel free to ask if you have more questions!