Anxiety attack or panic attack?

I have a mild condition of OCD where Im scared of dying. I also have a mild condition of hypochondria that ties in with the OCD. I have pretty bad anxiety, and when I cry, if Im crying because I got overwhelmed with anxiety I start hyperventilating. When I hyperventilate, once Ive calmed down I get pins and needles in my legs, but it feels 10x worse than what it would feel like if your leg had fallen asleep.
Today I was watching Obsessed, and they explained a panic attack. When I hyperventilate I always call it a panic attack but what they described in the show was different and I tried googling the difference but I was having a hard time finding what I was looking for.
1- Whats the difference between a panic attack and an anxiety attack and what am I having?
2- Whats the pins and needles in my legs after I hyperventilate?

The answer to number two is usually lack of blood circulation or lack of oxygen due to hyperventilating of heavy sobbing and stress.
The answer to the first is that anxiety attack and panic attack are about the same. Now general anxiety is just a feeling of anxiousness or being really worried like circular thinking all the time. Panic attacks make you feel like you are going to die and you panic and your heart races and your breathing is heavy and you usually crawl up into a ball and want to not live.
I hope you get help and feel better, I for one care for I know you are not just another avitar on the computer screen, therefore I remain,
Your Assistant

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