Hope this helps a bit and that everything goes as well and comfortably as possible.
With my first, I started having contractions that woke me up in the morning, but I wasn't really in labour until the evening and he was born the following morning. It felt really hard at the time, but it wasn't that long and during the first stage I could rest on my side between contractions, particularly with a heat pack (really recommend those, I really loved my heat packs during all my labours). I found during the second stage that being on all fours and pressing my head into the raised head of the mattress very helpful. I ended up with mild labia grazes. Other than drinking plenty of extra water to make going to the toilet easier (with my second, I was given lactulose to help with that, but I had also been on iron supplements which can cause constipation) and leaning forward when I peed to prevent as much urine as possible from going over those grazes, there was little issue over the weeks they were healing and I've no issues now. There were some issues with the placenta being delayed (I remember being very annoyed that the NHS book gave like 3 paragraphs on the placenta and it was the one part that didn't go textbook, with my first it took nearly two hours to deliver), but even that caused no long-term issues.
I've had four vaginal births, and those grazes were the worst I ended up with though I did have greater issues with some later placentas (according to one midwife, the one she delivered was really oddly large and she suspected that might be why 3/4 of mine took ages).
I did have some incontinence issues a few years after having kids (and I still wear cloth pads when I have a cold due to experiences with stress incontinence with I sneezed), but those ended up actually being connected to not entirely related muscle issues and nutritional deficiencies - my pregnancies put greater stress on my systems, but would likely have become an issue eventually anyways. There are women's health physios that can do checks in the months afterwards if you're concerned and even some online that do video courses on core muscle groups that, alongside nutritional blood works and getting those sorted out, worked really well for me. I haven't had any issue with it in years, even when I went through a thing of drinking 1.5l of water first thing in the morning.
I already had C-PTSD before having kids, including some around medical issues (my birth plan was essentially 'I'm very scared to be here and a bit on why, please do not ask my spouse to leave, here are relevant medical considerations). While the anxiety parts did increase during pregnancy and remained in the months after having my kids alongside some PTSD-type issues like repetitive rumination, numbing alternating with hypervigilance/irritation, that all faded, especially once I was able to take better care of myself (I've also had arthritis in some joints since being a teen, joint pain was my biggest early post-partum issue). If that becomes an issue, there are professionals and those of us with experience who can give you help. There are treatments and coping skills that can be learned to second nature. It isn't something I would wish on anyone, but it can be managed and many of us live happy lives.