Confused

So tonight i went to the er for some cramping and light bleeding. This is my 5th pregnancy but ive had two miscarriages. So i wanted to make sure everything was ok. According to my lmp im 8w1d. Tonight in the ultrasound baby is measuring 6w4d with a heart rate of 149. The doctor said hes not to concerned. He has a strong feeling this pregnancy is gonna be just fine. Ive never done much with hcg levels. But i finally got a copy and have no idea what im.looking at.. is the top number ( 21,215.00) my level? Is that ok for 6 weeks? Help!!! Lol