question: Hi, may I answer your health queries right now ? Please type your query here...I am 18 weeks pregnant...took a z-pac last week for a terrible sinus infection was done with it on sat. my doc prescribed it to me. I just started porgesterone shots to prevent pre-term labor. I have noticed that my tongue is yellow and has been for about 5 days. When I brush it it goes away but then comes back the following day. At night I still have a very congested head / nose and now have a very sore throat. What is wrong?