Cantankerous
Mechanical trauma: check. Bit my lip a few days ago.
Emotional stress: check. Losing a baby is a wee bit stressful.
Nutritional deficiencies: check. The methotrexate shot acted much like an anti-folate.
Hormonal changes: check. Abnormal pregnancy to an abrupt termination of said pregnancy.
Genetics: check. I can blame my father for everything, and his mother before him.
Verdict: a giant canker sore just inside my lower lip, in a prime location for my canines to rub it every time I move and breathe.