Hi Had A Gel Mani 3 Weeks Ago A Few

Hi had a gel mani 3 weeks ago a few day later my middle finger was getting tender.a week later I have black at the top of nail was told it was fungus.put finger in bleach and was using over the counter anti-fungal .About8 days when my fingers get cold on the right hand it becomes very painful but once my hand warms up it is ok Went to the doc today she gave me GABAPENTIN