I have a pea size bump on my lower lip that has formed after I bit my lip and it hasnt went away for like 2 months. Any advice?

Swelling. Any pain, bleeding, or swelling requires evaluation, especially if it is of over 10 days duration. Please see an Oral Surgeon. Your Dentist can direct you.
Important to... It's important to see an Oral Surgeon to evaluate the lump, determine if it's benign or serious and whether or not it needs to be removed even if it appears innocuous.