Panic attacks

Today I was working at the pizza restaurant and I look up to ask what the customer would like me to make and I freeze. It's him. He smiles and it makes me think he's thinking "ha I got you" I quickly make the pizza, run to the back, and tell my boss I'm not feeling well and he lets me go. I get in my car, race to my church that's 5 miles away, text a friend, she comes and finds me, and I breakdown and have the worst panic attack I've had in a while. I keep having panic attacks and they are so exhausting I can't stop them though. What can I do?