I had an ultrasound on the 13th of this month to check on the baby and make sure things were going well. Everything was perfect, I heard the heartbeat and was right where I should be (6w3d). Yesterday, I had an ultrasound and they told me the baby was measuring 7w2d making me a week behind because technically right now I should be 8w3d considering I'm due March 2nd. An not to mention my hcg levels are 55,000. Which is the levels of someone 5-6 weeks pregnant. Should I be worried? This is my second pregnancy I miscarried my first pregnancy in April. I just want everything to be ok with this baby.