Over the past couple years i've developed several "new" allergies and my allergist said a person can develop an allergy to anything at anytime. I would get it checked out, especially since it's food and you don't want to experience anaphylaxis.
About 5 years ago my youngest brother suddenly developed an allergy to bananas (he was in his mid-late twenties.) Same symptoms as you: burning lips which also swelled. He had to stop eating them.