How many weeks/days do you think? Just for fun

Katie • Expecting my rainbow baby Jan 2017 ❤️
The lady who did my US said I was 6-7 weeks. This was done on Friday 3rd. By my calculations I was 6w 6d when this was done. What do you think? It's killing me not knowing the exact date! I have 5 more weeks until I get to find out! I saw a heartbeat too :)