Could it really be my Kidneys?

Patient: For the past week i have been in and out the doctors.i have been having pains on both sides of my lower abdomen. My family doctor had me take several urine sample and the tests came back saying that I have protein in my urine. I then went for a ultrasound to check my kidneys, but even those test came back normal. So from a month from now they want me to go for more blood tests, another ultrasound, and I have to pee in a jug for 24 hours. ..I don’t know what to do I guess they just want to wait and see what happens. No, I have never had sex.. .so I don’t think that could be part of the problem. Please give me your honest solution to my problem. Thank you.