Going Backwards

So last time I wrote, we were thinking I was 17 weeks along, which would put me now at 19. But now we are going backwards. I had a doctor's appointment last Wednesday and things went well. The baby had a good strong heartbeat and I was doing well. But as the doctor was pressing on my stomach, she mentioned that my uterus wasn't as big as it should be for 18 weeks. So she said, "you may not be as far along as we think", but we'll go ahead and do an ultrasound next week". So here we go- I had my ultrasound yesterday- and the baby measures 15 weeks 5 days- which means we are going backwards. "Onion butt" is back to being a "lemon head". So my new due date is now March 5th and I like March better anyways!