Ahhh my friend, I know exactly what you are talking about. Two years ago I was in an ATV accident and stuck my footpeg into the side of my leg. Well I kind just sucked it up, and rode back to camp (this was on a Santurday) the next morning we packed up and left the dunes and it was hurting pretty good, but I could deal with it.
When we arrived home it starting hurting a little more to the point where I wanted to just cut it off. I was taken into the emergency room. When the doctor took a look at the injury, she asked when it had happened, I told her early on Saturday and she wanted to know why it took a day and a half to get in there. She told me you needed stiches and now it is too late!
Long story short, the injury caused cellulitis and I was lucky enough to be hooked to IV's for ten days, and let me tell you, it was ok when I was sitting with my leg elevated but when I had to get up to go to the restroom, I swore I was just going to have the leg taken off...it was close to the worst pain I have felt!!
Anyhow, what I was trying to say is I feel your pain and wish you a speedy recovery