Welcome to the forums. I was in treatment for anxiety attacks some time ago. Many anti-depressant medications will also help stabilize anxiety, so anxiety and depression are treated together in many cases.
It was bad enough where an anxiety attack could slip into panic. I used to medicate it with alcohol, but that caused another slew of problems.
One thing I have trained myself to monitor, is my breathing. If my chest tightens up and I feel like I'm suffocating, I can easily hyperventilate. My arms, legs and lips tingle and it can feel like a heart attack. This can make the runaway panic even worse.
Deep, slow breaths and a distraction usually help me get back to normal.
If you haven't already, I would go for a complete physical exam to rule out any chemical or endocrine imbalances. If all look OK, ask your physician for a referral to a counselor or therapist to find help and relief from this.
Best of luck to you.