Spotting Continues

Light pink and brownish.  And the wait is killing me!  I peed on a stick when I got home, and of course it was negative.  Why can't I just wait until Friday for the beta and the ultrasound?  I still have some cramping and my boobs are sore too.  I felt a pinch and a dull ache on my right side earlier at work.  I hope this is it!!