I feel dizzy sudden for like 2 seconds and when I take big breath I feel like tickling in my hands and legs. Numbness in head when I go to malls.

Get checked. This could be from anxiety (especially if you notice symptoms only when you go to malls), but when your doctor checks you, they'll be focusing on your heart - listening for any murmurs or abnormal rhythms. They will also ask if you have been having any caffeine or nicotine, which are stimulants. Best of luck to you!