Think I'm pregnant but all say negative

Jessie
I went to the clinic today to ask for a blood test because I'm 13 days late. They said that they could do it, I paid my copay and went back. They had me pee in a cup and wait. The clinic doc came in and said well "no good news. It's negative. There is no point in doing a blood test. It's a waste of time." Now wtf do I do?!?! I want this so badly but my body is flipping out. I'm never more than 2 or 3 days late. My husband is pissed that the doc did that.