Dr. said i had a stress fracture that healed itself on my small toes area-how come i didn't know? 1/16 ankle tendinitis could that be similar pain ?

A stress fracture: is due to chronic, repetitive use/overuse or microtrauma, so you wouldn't necessarily recall a specific injury or event. The pain would be in a different location from pain due to ankle tendon pathology. However, it is conceivable that a chronic ankle tendon issue could lead to altered walking mechanics which could lead to a toe stress fracture.

Stress fracture: Is not a complete farcture or broken bone. The evidence of a previous stress fracture can be picked up sometimes on xray, CT scan or even MRI. You may have only noticed some joint pain or tenderness and it may not have caused you a lot of pain. It could result from a fall, trauma like stubbing your toe really hard or an increase in activity. If it did not bother you, you may have healed quickly.