How can I get rid of green spot under my finger nail where I cut it?

I cut into my finger and nail on accident, I was disinfecting it daily and nothing seemed wrong, I cut it about 2 weeks ago, the finger is almost healed but I noticed last night, under the nail where I cut, a green patch has formed. It is painful when pushed on, at first I thought it was a blister but now I am not sure. I would love to go to the doctor’s but I do not have health insurance for another 5 weeks.