Negative test at DR

Kateland

I went to the Dr yesterday for lab work. They took a LOT of blood and had me pee in a cup. I got a call this morning that my urine tested negative and they want to get more blood. If they didn't test my blood for pregnancy what did they test it for? And I've gotten multiple positive at home tests, of different brands, the darkest line so far being yesterday before my apointment. Just not sure what is going on.