yah it is they gave me ibuprofen 800s in the hospital and I nurse baby,

they usually prescribe ibprofin after a c section so I'm pretty sure it's safe

usually you should take tylenol

yes I'm on it and I'm breastfeeding

I don't believe so. I think it's the same rule as while you're pregnant. but I'm not sure, you should ask your doctor, each doctor has different rules and preferences.