Something other than UTI?

Ashley
Has anyone during pregnancy thought they had a UTI?  I called the doc because I am having burning and bleeding when I go.  I am certain the blood is not coming from my cervix but instead of testing right away for a UTI my doctor wants me to put a tampon to be sure I am not having any pregnancy related bleeding and then call back in the morning...  I have not had any bleeding inbetween bathroom visits.