Can a urine test pick up a possitve at only 2 weeks pregnant. I had 3 tests and all said possitve.?

I just got my blood work back and my hcg level is 75 so it places me at 2 weeks along. My last period was Oct 13th so I don't get it. I thought it would be a bigger number. It does say that non pregnant women have an hcg level of 5 or less. So I am pregnant but the numbers just are not jiving with me.