anyone not have a US yet?

Due on Jan. 23 as of now!  My first us is next Monday!  So nevous!  Last feb I had a us at 10 weeks and there was no heart beat!  Baby stopped growing at 71/2 weeks and I had no signs of it! Now I will be having one at 12 weeks and can't seem to shake the bad feelings something bad is going to happen as I never had and signs of lost the last time!  I have been feeling a little nausea and sore boobs!  I just want to no everything is good!  They tell you not to agree but like how does one do that!  I tell you us women man do we have to be strong!