Hi, here's my opinion:
If you saw any line, usually that means positive. Like Dingo said, get another test and use the first morning's urine. You should also go to a different doctor and request a blood test. They are more accurate. and I think the bleeding is okay if it isn't bright red and isn't a heavy flow. I was pregnant in April which unfortunately ended in miscarriage, but before that happened, I did have cramping even before my period was due, which my doctor said was completely normal.