Hi, I'm 15 wks and 5 days prego....Went to the Dr yesterday and they said there is blood in my urine. I had pre-term labor with my last child and I remember it starting with a bladder infection. I was on bed rest for 3 1/2 months. I asked the nurse if I should be worried and she said it can pose as a problem, but they were sending the urine of for uninalysis. Should I be worried? Is there anything other than kidney/bladder infection that can cause this?