Need advice


So I'm two weeks late on my period. Went to the doctor yesterday and they did a urine and a blood test and the urine test was negative and my Hcg levels came back less than 2. I'm still having back pain and pelvic pain. I've had spotting here and there over the weeks but it's been spaced out and not consistent from day to day. Should I be concerned or should I go to the ER?