3 weeks post-op and my right incision has been open for about the last week. How likely is explant?

I'm 3 weeks post op and my right incision (in the crease) has been open for about the last week. I'm on two strong antibiotics and icing a lot, plus changing the gauze over it twice daily, but I still have discharge (yellow and red). That breast is swollen, but not red) but my PS said worst case I'd need to have the implant removed. He didn't tell me how likely that is. Are my odds 50/50? Better? Worse?