Thanks for checking in with us. Please read the post "TO ALL NEW POSTERS....". It is a set of guidelines in anxiety forum that will help us to help you in most efficient way.
I have several questions I want to ask, but until you lay all the circumstances of your anxiety attacks out for us, will wait. OK?
It is probably best You speak to a health professional- a doctor, psychiatrist.
It could quite possibly be caused from Anxiety but if it is concerning you should see someone about it especially regarding Your anxiety which a doctor can help you overcome.
Best of luck