(a change in sense of taste)
Outside of pregnancy, a change in the way you experience taste is something that should be checked out by a doctor, but in the presence of fluctuating hormones, it can be very common.
A frequently reported change is a metallic taste, sometimes when eating certain foods, but for some people it can persist even when you are not eating.
Some things that can help are regular teeth and tongue brushing, eating acidic foods (if your stomach will let you!), or changing to a different brand of pregnancy vitamin.
This symptom usually goes away by itself in the second trimester, but if you are concerned, mention it to your healthcare provider.