Having problems

I knew something was wrong. I'm freaking out right about now. Since this morning I have had cramping and lower back pain. The cramping comes and goes and is sometimes sharp, but it goes away. My back is pretty bad. I went in to the doctor. They did a urine analysis and it came up with a lot of blood in the urine. She thinks it's a kidney infection, which is NOT a good thing. Then, I had her do a pregnancy test because I just feel weird and the line was pretty light, so she sent me straight to get a blood test done. I won't know for 3-4 hours what the results are and I'm completely freaking out.