Dd who is 16 has an allergy to white fish so carries an EpiPen, Tonight she ate a few grapes and has now complained that they have made her throat and roof of mouth itchy. Stopped eating them and has drank lots of water. Does this sound like an oral allergy. I haven’t given her anything yet, but will probably give piriton if it does calm down shortly. Should I be worried about it progressing at this stage?