Wantbaby - a good friend had a growth scan and turned out the baby was just a little small. Like you my friend is petite so her baby just took after her. The baby was also lying really far back so my friend's tummy looked small but was all okay. I know you're probably completely stressed by it all but I think continuing on as normal and eating up big (now is a great time to order DH to the shops each night for ice cream!!) is the best you can do xx