Maddy was perfectly well. We we on the aeroplane heading across to bali she was 2 yrs old & knew my niece & nephew had just had chicken pox, but I tookl her to toilet at beginning of flight & noticed the first blisters & by the time we landed she had a few on her face, by next morning she was covered, but happy, she ate, drank & slept perfectly well, my Mother in law covered her in an antibacterial powder & anti itch local powder.
But we kept her in the village for about 5 days & then really early in the mornings we'd take her to beach & let her swim in salty water!
Maybe take her back to GP.