Hard, painless lump for month now. size of small pea. jabbed with end of toothbrush before bump. same color as palate. not on midline. fibroma? cancer

Have it checked : Lumps in the mouth be the result of a number of things. They range from benign cysts and tumors to things that are more serious. If you smoke and/or drink, it raises your risk of having something serious. It's best to have it checked by your doctor.

Lump: It would be futile to speculate as to the cause of your "lump." You need to see a General Dentist, a specialist Oral Pathologist, or a specialist Oral Surgeon for a clinical examination, thorough medical and oral history, appropriate imaging/lab tests, and possible biopsy. You have named two possibilities, but there aorta literally dozens of others. Please make an appointment for evaluation.