I had two pulpectomies yesterday on #28 and 29. #28 showed a sm. root tip infection. i now have a lump under my jaw below the teeth. is this normal?

Could be: Could be normal. Possible post op infection. see the doc who did the procedure. If you're not on antibiotics, the doc may want to prescribe.a

Parulis fistula: is a sign that there is chronic infection and your body is draining it out. Unlike some other types of infection, a chronic dental abscess will not get better on its own. See your dentist for definitive treatment. Good luck.