Oh you for love, I completely sympathise with you, I had one with my first and it was so sore.
Firstly, it could be bruising pain that hurts, not the stitches. My arse was black from the ventouse. Get some arnica tablets and cream.
Also take paracetamol and ibuprofen one after the other at the minimum time allowed eg: paracetamol first, ibuprofen 2 hours later, paracetamol 2 hours after the ibuprofen etc so there's no gap iyswim.
2 shallow baths a day with lavender oil (just a few drops) and a cup of milk in the water. Helps with bruising.
Have you got a feeding pillow? Like a Boppy? Bugger feeding with it, sit on it! It will help to take that pressure off your nethers.
Take a small dose of lactulose as a precaution to help with going to the loo. You can buy it from chemists. Use moist toilet wipes. I would imagine your bum is quite sore too.
Get some short tip top lollies for the freezer. Wrap them in gauze and apply to your bits. Not dignified at all but so helpful.
Rest. Do not overdo. Get everyone to do everything for you.