question: I’m having severe welt like hives. I was on macrobid for a UTI and took my last dose on Monday. I’m also taking progesterone because I’m 7 weeks pregnant and I’m at high risk for miscarriage. Do you think the macrobid could be causing the hives even though my last dose was Monday or do you think progesterone could be the cause? Im due to take the progesterone right now and I don’t know what to do.