Hi, after childbirth I developed an allergy to some medications. I fir…

Hi, after childbirth I developed an allergy to some medications. I first had it while still in the maternity hospital — they said it looked like hives but weren’t sure. It went away, and three weeks later it started again. What should I do? Right after delivery it was on almost my whole body, now it’s only my legs. Has anyone experienced this? It itches terribly; I’m trying not to scratch but it’s very hard to resist. I keep moisturizing constantly to calm the itch a bit. Which specialist should I see?