thank you for the help :) i'm just excited to see it
Ultrasounds this early are usually given to women who are considered high risk, have abnormal bleeding or other concerns (such as multiple miscarriages or a particularly difficult pregnancy in the past). Otherwise you won't get an U/S until around week 20.
I would count Feb. 17th as your LMP and calculate your due date from there. It sounds like a regular, normal period. Especially because you didn't get a positive until recently I'm pretty certain you're probably about 4 weeks pregnant.
I put your LMP into a due date calculator, assuming you have 28 day cycles, and it says you are 4 weeks 2 days pregnatn and due November 25th. Congrats on your Thanksgiving Turkey!