How do you know if you're having panic attacks? outta no where i get nervous sweat heart and mind race sometimes get dizzy how can i make this stop?

Sounds like it: The missing usual symptom is the sensation that you are going to die (during attack / as result of it). Unfortunately, only long-term resolution is to address whatever is triggering them. This requires seeing a therapist/psychologist to identify problem. Your dr or a psychiatrist can work with you & therapist to rx meds to reduce severity of symptoms while working on problem. Get seen.

Please have a physical exam to know if you have an underlying illness. If not please see a Clinical Psychologist with expertise in multiple types of psychotherapy for help overcoming anxiety and if needed as Psychiatrist for medication.