ok so just wondering how the whole due dates based of LMP work. do you count from first day or the last day? or since I tracked my ovulation and had obvious IB would I count from those days? if I go with my first day of LMP I'm 7w4d. if I go from last day of LMP I'm 6w4d. if I do when I ovulated I'm 5w exactly. and if I do when I had IB I'm 3w5d. my period would have been Nov 18.

I've had bloodwork and maternity physical. doctors confirmed pregnant.

first ultrasound is Dec 20.