Im confused!

Hey guys! So I just had a weird period where larger than normal clots were passed, it was late, started with 5 days spotting. From first day of spotting to last day of blood seen, its been 8 days. I had a urine test at drs a week before it started and it was negativ. Called my drs office and they ordered blood work. I got the results back and it states 46 mIU/mL. According to the results provided, it says I'm pregnant. Do I worry?? Dr has yet to call me and confirm this...