not at all...at least I do not think. You are 11 days past ovulation, which means that your little one just barely implanted itself into your uterus, thus hormones are just beginning to seep. Your Dr. might want you to come back to make sure it is a positive, when there are more hormones in your bloodstream.
HCG is detectable in the blood serum of approximately 5% of pregnant women by 8 days after conception, and in virtually all the rest by 11 days. HCG rises progressively from conception. Levels double on the average, every 30.9 hours until values reach 6500 mIU/ml (6,500 IU/L) at approximately the eighth week after the last menstrual period (LMP). After that the rate of rise becomes individualized, peaking between the 60th and 70th day (9 to 10 weeks) LMP. HCG decreases slightly between the 12th and 16th week post LMP, and then remains constant until birth.