I've had a whiter than normal tongue during the past few weeks and a really rotten (this is the only way I can explain it) taste in the back of my mouth. I had the MD take a look at my appointment last week and he wasn't positive it was oral thrush; but, I was given a prescription for nystatin, anyway. He said it's totally safe to take during pregnancy. I am thinking about filling the prescription tomorrow because it's really starting to bother me. I was wondering anyone has experienced oral thrush during pregnancy and, if so, if you've taken nystatin or another medication for it. I'm just a little nervous to take something even though he assured me that it was safe to take!