Suggest Treatment For Sore And Purple Toe Nail

i wore tight shoes a couple of months ago and when i woke up the next morning my toes were sore. after a few days the pain went away and i had them covered with nail polish. a couple of weeks later one of them started hurting again so i trimmed the nail and it was pretty short and yellowish. so now being almost 2 months later i went swimming and it started bothering me again so i took the polish off and my nsil is purple with a white spot in the middle. what should i do?