Decided I was going to pierce my lip with a sewing needle. It went thru but then I changed my mind and now my lip has a bean size hard lump. Why?

Piercing. Hi, what a careless thing to do to the body, most likely you have a hematoma there (collection of blood which is now hard), that is formed and prevents more bleeding, it will be reabsorbed slowly by itself, but see a doctor to make sure you don't have any infection there.
Hematoma. Most likely a hematoma (blood clot) formed at the site of the lump. treat with a heating pad, might help resorb the hematoma.