Mama, please message or call your OB agad about the bleeding and the opening sa taas ng tahi, hindi dapat mag-alala ka mag-usap sa kanila, yan ang trabaho nila!
Once she confirms it's safe, you can definitely shower na with gentle care, a few of us went through the same worry post-CS, and it really helped emotionally na makapag-proper bathe. Just keep it clean and dry after, and follow what your doc says exactly.
For the stretch marks from the PUPPP, a lot of my mum friends swear by Mama's Choice Stretchmark Cream & Serum, pregnancy-safe and breastfeeding-safe, so you can use it now. They really do help fade them over time, lalo na fresh pa lang.
Kaya mo yan, mama, healing takes time!