My dog's nail is falling off. What do I do?

A couple weeks ago my 6 year old pug hurt his back paw. I took him out to go to the bathroom and he came back in with a bleeding back paw. I calmed him down cleaned and sanitized the area thinking that he just had a cut on the pad of his foot. The bleeding stopped and the next day I took a closer look. It looked as if it were where his little pinkie toe connects to his nail. The wound started to heal and he wasn't limping or crying, so I just left him alone and kept the area clean. Today, he got into a little tiff with my other pug and it started bleeding again. This time when I went to go clean it, it looked like his nail was almost detached. I made sure not to pull on it or anything because I didn't want to hurt him or infect the area. I currently have him resting in a kennel away from my other dog. My family is extremely strapped for cash right now (just like everyone else) and I'm hoping I won't have to take him directly to the vet.