How can i stop a panic attack before it occurs and if it does occur how could i get over it fast?

Get treatment: If you are having panic attacks, they may be occurring as part of panic disorder. You owe it to yourself to start a psychotherapy and your anxiety can be a focus of treatment. Depending on severity and/or treatment response there could be a role for meds also. Providing you general information about panic I think would miss the point of actually encouraging you to seek further treatment.