Allergic reaction

32 weeks pregnant and got put on antibiotics for a uti, which I don’t have. They just assumed before the urine culture came back and told me to start them. Well, pretty sure I had an allergic reaction to them. My throat started closing up and it was hard to breathe and super painful, like sand paper. Went into the ER and they told me I was just anxious (not true at all). Well, culture came back negative so I don’t have to continue them anyways, but I’m still left with an extremely sore and painful throat. I’ve tried everything. Has anyone had this happen??