What to do if i'm feeling it inside my mouth. i have cold sore all along the side of my mouth that the lump is on if that helps. could that cause this?

No it doesn't help: There's no way to tell from your brief description exactly what's going on. You'll have to bite the bullet, pick up the phone and call your Dentist for an examination. After seeing you your Dentist can tell you if what you are looking at is normal anatomy or something abnormal. Take advantage of your Dentist's 10, 000+ hours of training and his/her professional experience, let a Pro take a look.

Canker sore : appear in the mouth and can be painful, specially the side of my mouth. The canker sores are the most common oral lesions. The cause is unknown. These lesions are bumpy and painful. Topical medications OTC applied directly, mouthwashes, and oral medications can relieve pain or inflammation. Rec.: if not comfortable see a dentist for evaluation and soft tissue laser treatment.