I was exactly the same, I'm so sorry it's not easy! Honestly, I didn't do anything special, but at 9 weeks pp I suddenly felt a lot better. I would say rest and time ❤️ I tried all sorts to help but I found just leaving it be and resting when I could was honestly the best thing x
I found the witchazel foam on a pad really helped cool and soothe me, also my peribottle was a saviour when my stitches felt tight!! I sat on a donut for a while to help too, it's tough going! Hope you feel better soon