Put baking soda paste on it with gauze several times a day. It'll draw out infection. I had one and did that. It came to a head like a pimple and It eventually "popped" I had a hole in my leg but it healed and is scarred

Do you know what kind of spider it could have been?

Omg😲 i had one too like 3 years ago no lie i also though it was a pimp so i try poping it worst mistake i did. It got so bad i couldn't even move my leg of the pain it look like a gun shot it was bad!!!! I had to go the to the doc to get that check up:( hope you keep that area clean and doesnt get worst