second_time_around_4_me:I have been on amoxicillin in both 1st (uti) and 2nd (sinus infection) tri. It's a category B, so considered safe during pregnancy.
See I have an upper respiratory infection confirmed by my OB and they told me to ride it out with mucinex or benadryl. I personally feel safer not taking antibiotics even though I am probably suffering more : (