Although I avoid answering gynaec questions, I couldn't help but notice. Your bleeding may be directly a result of the urine infection. Ensure that the infection is well controlled first. Interactions of drugs with loette may be limited. Moreover kindly do not take prolonged courses of loette without knowing the possible adverse effects of OCPs. No smoking, regularly activity, plenty of hydration, are a must.
Thyroid function must be checked. I hoped you have discussed these things with your gynaec.
Regards