Yeah, I just saw a still of the injury. As a medical professional, #Trump was definitely shot at.
Discussion
Can you post the still image here?

Cheers! What are you seeing to make you convinced it's legit?
The amount of blood is right for that area. The darkness and lighter patches of blood look real. The impact area at the front of the ear is what a high speed impact of some kind would look like, some tissue appears to be missing.