Yea I didn't notice it in your first shot, got a long baggy sleeve shirt on and angle of shot hiding it some.
You should straighten your bow arm, with proper form the string should not hit it.

That and the raking of the bow arm with the string is more a traditional shooter thing, a archer using fingers/finger tab release more then it is for someone using a trigger.

Finger release, a badly done one, the action can tend to push the string toward the bow arm raking it, something that just doesn't happen (well it does but totally shooter error) using a trigger, the trigger release imparts no left (or right) motion into the string at the moment of release.

The third picture, the nock making it to the corner of your mouth, looks much better.

Straighten your arm once and post another shot so we can see how it looks then.