Hi thanks for your question.
Urinary tract infection
(UTI) can cause bleeding with urine,but of not the type bleeding your describing, that is dark red,with small tissue along with it.AZO will not cause bleeding.
I would suggest you to consult a gynaecologista.who may examine you and advice you urine examination to differentiate between haematuria (bleeding with urine from urinary tract) and bleeding due to abortion
Hope this answers your question.