I'm so sorry 🌺
Not the same situation, I know, but we found out our baby had problems in the second trimester and took the decision to TFMR. I also had medical management to give birth to our little boy at 16 weeks.
My labour lasted about 4 hours.
Lean on the hospital staff as much as you need to. The midwives were fabulous with me and made the whole process so much more bearable. Our son was obviously very small at 16 weeks but the hospital staff dressed him in little clothes and we were able to spend 2 days with him before going home. (You may decide not to do this which is perfectly fine. The midwives will probably talk through all your options with you and give you lots of opportunity to change your mind). For us, this helped enormously.
We took lots of photos. You may not want to do this but, if you're not sure, it might be better to take them and ask for them to be put away somewhere in an envelope - at least you have the option to look at them later once you feel able. I have looked back at the photos a couple of times since when I've needed to.
My mum bought a blanket which we wrapped him in when he was born. I kept that blanket as it smelled of him and bought a second one to wrap him in in his coffin.
We're not religious but I made a last minute decision to get a minister to come and give him a little blessing. It may sound silly but I needed to know someone would look after him in heaven and this helped me. I didn't think of this at the time but I wish I'd taken a story book with me to read him a story.
I'm saying all this but I know lots of people don't feel able to meet their baby when they're born sleeping and this is also perfectly fine. You need to do what feels right. I thought I'd share my experience in case it gives you some practical things to think about ahead of time.
Take as much time as you need to grieve afterwards. The hospital referred me to Petals for counselling which may be helpful for you.
If you have any questions please feel free to message me.