I was uncertain about my lmp when my u/s was done. at 1st she suspected 6wks but got a measurement of 7w 1d then 7w 4d. is this +/- an anticipated lmp?

7w1d: If you are uncertain about your LMP you are dated by your earliest ultrasound. If you know your LMP then a first trimester u/s should correlate within 1 week. Since you are uncertain of your LMP then you use your ultrasound date as your gestational age on that day. You can then use a pregnancy wheel or an "app" that will calculate your due date. Congratulations and good luck.