Good afternoon, I am Dr Ruff.
Your question has come up again, so I hope my answer will be of some assistance to you. I am however sorry to hear you are having to manage this.
Congratulations on your little one though.
So as it is day 4 post delivery you would expect the swelling to have naturally continued to increase to this point, normally takes a day to start, then builds up over about 48 hours. Stool softeners are useful to reduce pain, as straining will be rather uncomfortable.
With these tears, the discomfort will take about 7 days to start subsiding, at which case the swelling will be reducing by this point naturally, without any thing to speed it up.
Anti-inflammatory medications certainly reduce reduce inflammation and therefore this is your best options, such as Ibuprofen or Naproxen. Both are considered too small to be harmful if you are breast feeding. Other than this, warm baths to help will also be soothing, and I would assume after 48 hours post tear this should be okay to do, but your surgeon would have told you the after car for this.
However I do suspect you are at the point where over the next few days your symptoms will naturally improve without the need to do anything.