hCG Levels! Blood work all done!!!

Amanda
Hi ladies. So Wednesday Feb. 15th was my first blood test, in which my hCG levels were 94. Friday the 17th, my levels were 300. They requested I wait a week and get more blood work done so.... Today, the 24th, my levels have jumped to 6000! They are estimating I'm 5-6 weeks in... and scheduled my "OB ultrasound" for this upcoming Monday the 27th! I'm nervous in a sense that isn't it too early for an ultrasound? I was aware that they begin scheduling at 8 weeks. What IS an OB ultrasound? Will I see something this early?! Any advice? XOXO