Waiting for hcg result

Hannah • Mommy of 4 handsome boys - wifey - nursing student - medical assistant - live, laugh, love.
I'm only 3 weeks 6 days but I was having cramping and spotting a few days ago so my doctor wanted to do an hcg test. I got one on Monday that was only 73 and I did my second hcg test this morning, just waiting for the doctor to call me with the results...I'm so anxious. I just wanna know what's going on. Did anyone else have to do hcg tests?