Hiya boobesque,
I had one a couple of months ago. I went to the doctor and he gave me antibiotics, but said I should soak my foot in either salt water or in water with antiseptic in a couple of times a day. Was no better a week later, and was given different antibiotics. They still didn't seem to work for me. In the end I perservered and managed to cut the piece of nail out that was sticking in my toe (it DID hurt, but I was determined!). That solved the problem and it's growing back normally now.
I would advise soaking it as the doctor suggested. Oh, I also jammed a piece of cotton wool soaked in antiseptic in the gap between nail and toe and covered with a plaster to hold it in. This helped to force them apart a little, and was more comfortable.
Hope it's better soon.