Light red coloured blood in urine. Me!

My grandmother is on bed from last one month and she was diagnosed with kidney infection.Reports are normal now but Dr. suggest for urine bag because of bed sore she is having as she is unable to sit nd urinate. Yesterday afternoon her urine bag was changed along with catheter and from last night she is having continuous light red coloured liquid, sometimes dark red coloured clots seen in tube, foul smell is also there form that catheter. We are unable to take her to the hospital as she is not in that condition. Please suggest me something and if possible the medicines that can help in treating this infection along with some home remedies. Please do help me regarding this. She is drinking plenty of waters too around 4-5 litres a day. Thank you! Awating your response!