Hives

Has anyone’s baby had mystery hives? My child has had hives now everyday for 15 days with no end in sight. I’m having to give her Claritin twice a day and Benadryl every 6 hours just to keep her comfortable. This is killing me but the allergist says all I can do is wait them out that they could go away any day or last years 😩. I’m mentally and physically drained from this and it’s killing me to put this much medicine down my child who has never even been sick before!