Hormone Levels...

So yesterday I went in for some lab work to determine my hormone levels and too see how far along I am. I am 6 weeks if we are going off my last cycle, however my hormone levels are at 5 weeks, so they are a bit lower than they should be. The nurse said I shouldnt worry about it to much and its normal for some women to measure smaller. They are going to retest my hormone levels Wednesday morning, to see if they have gone up to where they should be, if they havent raised at all then they are going to do some ultrasound to make sure everything is measuring where it should be.