My mom gets angioedema, so am I likely to get it later? Is she allergic to something?

Angioedema. In 80% cause we dont know what s causing it. It s a form of chronic urticaria. There is a chance you may develop this, higher that the rest of population. You may never develop it whatsoever, if it happens go see a dermatologist to see if can identify a cause and establish proper diagnosis. Hope it helps.