Necrosis of the belly button and sepsis or blood infection after tummy tuck?

I had a tummy tuck 4 weeks ago, since then I've had Necrosis of the belly button, and now Sepsis or a blood infection that I was treated for overnight in the hospital with antibiotics. My belly button still oozes. I know both of these are uncommon and so uncommon that I can find any info on how I should feel? Im sleeping a lot, I hurt a lot. I dont think its normal