With both of mine I never even wrote a birth plan I just said to my midwife that I had no idea what I would be like with the pain so would never rule anything out and that I had no intention of coming up with some 'ideal' picture of what it would all look like. I think this was the best possible thing to have done. First baby my waters broke naturally at home at 6am with grade 3 (highest grade) meconium in them so I was told to come straight to hospital where they put me on a drip to regulate my contractions. I went til 1pm with no drugs then I finally said give me the gas and air and then when they inspected me and I was 2cm or something I was like 'Christ just give me the diamorphine' found that pretty crap. Baby was back to back too so all day they were hoping she would turn. Baby in distress all day, had to do the thing where they took blood from her head to measure her distress levels. Long story short I had an epidural which was topped up 3 times got to
11pm (17 hours of labour) and they said start pushing. Pushed for an hour, nothing happened so rushed to theatre and prepped for a c-section (given a spinal block) but they said they'd try forceps first and she came out with forceps. If I'd had a birth plan all planned I think I would have lost my shit and just panicked and probably been traumatised by the whole day. As it was I just put my trust in everyone to get things done.
So I did the same with my 2nd who was induced but also had grade 3 meconium and an epidural but it was a much more simple birth. I suppose ideally this time I would hope it would be similar to baby 2, I am a little terrified of it all happening too fast with baby 3 and not getting time for an epidural etc!
But anyway my advice is don't worry too much about it all - ultimately you just want that baby our safely and you won't care what's tearing or not when you're in the middle of it! X