You can drink fennel tea, I drank peppermint tea and it didn't make a darn bit of difference to my breastfeeding. But you want to avoid sage. Raspberry leaf tea helped reduce my swollen uterus fairly sharpish too (as does bfing obviously)
Major allergic reactions to plasters are not that common, if you have had a blood test and your arm hasn't blistered when they've put a plaster on afterwards, you'll be fine. I was just unlucky.
In terms of bleeding, mine was very similar to my regular period (although it's been so long I'm not sure I remember what that was like - another plus of breastfeeding ).
I could lift my baby immediately and was up and walking the corridors 90 minutes after my section, I had the epidural removed within two hours too (but apparently that's rare and most people keep them in for 24 hours - I have a high pain threshold).
Take the drugs they give you though because on day three or so, boy you know you have had major surgery, you just suddenly feel shit and really sore as the bruising comes out. Holland and Barratt btw for the arnica pills.
Tell your friend to get over herself, if she manages to get through having a period she can get through post partum bleeding. Anyway I reckon it's less with a caesarian as they suck some of it out when they are rummaging around in there!!!