How can I get rid of a horrendous odor?

Recently, I left some milk in my room..( i shouldn't have had it in there anyway, I know )..but it curdled. I forgot about it and the other day when I was cleaning my hamster's cage, I knocked it over accidently. That was three days ago and it was cleaned up. It seeped into the carpet, and now I can not even go into my room. I think it is curdling even more in my carpet and I cannot figure out how to get rid of this gross accident. I tried putting on my fan and air conditioner when I was gone today and opened the door. So far, nothing has worked. Do you have any ideas? Any help appreciated! Only serious answers please.