People with panic attacks often report a fear of dying or heart attack, flashing vision, faintness or nausea, numbness throughout the body, heavy breathing and hyperventilation, or loss of body control. Some people also suffer from tunnel vision, mostly due to blood flow leaving the head to more critical parts of the body in defense. These feelings may provoke a strong urge to escape or flee the place where the attack began (a consequence of the "fight-or-flight response", in which the hormone causing this response is released in significant amounts). This response floods the body with hormones, particularly epinephrine (adrenaline), which aid it in defending against harm.[9]

Anyone can learn how to stop and prevent anxiety attacks. It’s a matter of learning more about them and knowing how to control and prevent them. Most people struggle with problematic anxiety attacks because they don’t understand them, and therefore, fear them…which is a common catalyst into Panic Attack Disorder. The more you know, the better off you’ll be.
I’m 15 years old and this is something very similar that happens to me everyday, it sneaks up on me at random times. It is a terrible feeling and almost uncontrollable. It started around 5 months ago when my grandfather passed away, I went to the the hospital atleast 5 times and I even get suicidal thoughts sometimes because the feeling is terrible and something I don’t wanna go through everyday. I don’t know what to do.

Anxiety can be either a short-term 'state' or a long-term personality "trait". Trait anxiety reflects a stable tendency across the lifespan of responding with acute, state anxiety in the anticipation of threatening situations (whether they are actually deemed threatening or not).[40] A meta-analysis showed that a high level of neuroticism is a risk factor for development of anxiety symptoms and disorders.[41] Such anxiety may be conscious or unconscious.[42]
Those who experience anxiety attack disorder are not alone. It’s estimated that 19 percent of the North American adult population (ages 18 to 54) experiences an anxiety disorder, and 3 percent of the North American adult population experiences anxiety attack disorder. We believe that number is much higher, since many conditions go undiagnosed and unreported.
People with panic disorder often worry about when the next attack will happen and actively try to prevent future attacks by avoiding places, situations, or behaviors they associate with panic attacks. Worry about panic attacks, and the effort spent trying to avoid attacks, cause significant problems in various areas of the person’s life, including the development of agoraphobia (see below).