Okay so when i orgninally found out I was pregnant the lady told me I would be 7 weeks today. Today I went to get my first ultrasound and the tech told me that the baby was the size of that to be 8 weeks today not 7. So I'm wondering how far am I then ? Am I the 7 weeks they originally told me ? Or the 8 weeks the tech told me today?  If anyone could help it would be greatly appreciated.