HcG levels

Hey ladies! I went to check my HcG levels on Saturday morning (4w4d) and my numbers were in the very high 300's. Went back to get my second test done this morning. Will have the results of that one tomorrow morning. Called the doctor and she said with my number it can range from 4w-6w pregnant. Has anyone had a number in that area and everything been good and doubled 2 days later? I've never experienced a miscarriage so I've never before had my numbers taken. I had a bit of brown spotting so that's why they ordered it for me this time.