Athletic trainer diagnosed swelling around the sesamoid bones in my foot. now feeling pain/stiffness near top of the big toe also. different injury?

Get examined by md: Sesamoid injuries to the big toe are relatively uncommon. Fractures to the sesamoid bones are most commonly seen in ( American) football. More likely your symptoms in your age etc. could be related to sprains of the 1st toe metatarsalphalangeal joint(turf toe). See an experienced ORS for examination and treatment options. Best of Luck!