I went to dr last Thursday for a sinus infection and was given strong amoxicillin (1,650mg twice a day). So today is day 7 and I am still waking with sinus pain. The mucus has cleared, or is clear, but I'm now having a very dark yellow mucus from my lungs (no cough). I would have thought antibiotics would have gotten rid of it completely by now? I am a lot better, just not where I thought id be. The dr did day this was the only thing they could give me due to pregnancy so feel I can't go back 