If the main question is "Is this abuse?" the answer is yes. The APA defines abuse as:

Any recent act or failure to act on the part of a parent or caretaker, which results in death, serious physical or emotional harm, sexual abuse or exploitation, or an act or failure to act which presents an imminent risk of serious harm.

Physical abuse refers to the injury of a child on purpose, e.g., striking, kicking, beating, biting or any action that leads to physical injury.

Being punched in the face and nearly losing consciousness would amount to physical abuse.

The sudden onset of panic attacks you had seem to be further evidence that you were physically or emotionally abuse.

While everything appears to be fine with your parents now and you no longer have panic attacks, you feel hurt and resentment over how they handled your panic disorder. I would suggest bringing this up with your therapist -- or if you'd rather bring it up with your school counselor. These are all issues they are adept at helping one to cope with. You should also see a T just to talk about your anxiety and make sure these panic attacks don't return, maybe find out what the triggers are.