Hello I'm also very sensitive and 'tight' down there so I feel I can chime in with some confidence!
There's lots of things you can do to prepare your vagina and perineum for birth and reduce your chances of tearing! A quick Google search will throw up a lot of stuff, and thenakeddoula on Instagram also has a lot of advice (among others!).
Having a home birth can reduce chances of serious tears by 40% (only if you're happy and relaxed with that option) and midwife lead birth centre has good stats too.
I had a home birth and refused vaginal exams as I knew they would irritate my vagina before the main event.
However, as baby was coming down, one of the midwives for some inexplicable reason started telling me to push - I genuinely did not think they did that in this day and age and thought if she was telling me to push there must be a reason why! So I really gave it some welly and baby shot out like a rocket....and I ended up with a third degree tear that I honestly don't think would have happened had I just 'breathed baby out' like I wanted to.
Anyway, third degree tear - obviously really not ideal, quite sore, and I would have preferred not to spend first precious hours with baby getting stitched up in hospital after a lovely home birth - but after the first few days it really is ok, and recovery can be quite quick if you give it a chance. To be quite honest, it's not worth worrying about - you get over it!
Fear is your enemy in labour, so read up, get prepared, and remember 'floppy face, floppy fanny!'