Just to thank everyone for all the support in this thread and to let you know that had my scan today just on 7 weeks. everything is fine. Measuring perfectly for the dates and heartbeat 139 so nice and strong. So relieved !!!
The sonographer said the fetus is in tucked in a very hard spot to see and she suspects that this is why the fertility doctor thought it was a bit small.
I have been so anxious all week I have made myself sick so now just trying to enjoy this a bit more to reach the next milestone which is 12 weeks.