I really need help with anxiety please help!?

I have always had this my whole life but it seems the older i got the worst it got. I'm 18 now and I really have no controll over it at all it happens whenever it wants to. Like when I go to the gym I get the anxiety feeling and I can barly workout. It's a pain in my chest and stomac I can also feel my heart raceing. Is there any way I can learn to controll this or get rid of it.