Rose gave you some wonderful advice!

1.) Make sure that you rule out possible physical causes by seeing a doctor with complete descriptions of your experience.
2.) Work with a T. They can really help you develop better techniques to work through stress, so more stress doesn't automatically equal panic.
3.) Reach out for emotional support from those who've been there ~ they're a light at the end of the tunnel. You aren't doomed to a life of misery, as you can see that others who had it bad, have been able to overcome their anxiety.
4.) Another great tip, by Rose! Remove yourself from toxic relationships now. The longer you wait, the stress and misery goes on longer and more deeply.
5. ) Try hard to give yourself a break. We are WAY too hard on ourselves ~ and our bad attitude does nothing but kick us down further. I used to tell myself verbally to "stop it" when my negativity kicked into gear. It does get quicker and easier the more often that you say that to yourself.

Gentle hugs to you ~ things will get better. Maybe not overnight, no. But as time passes, things will improve a lot. You'll see.