Could I be further along ?

Teah
I got a ultrasound 2 weeks ago and they measured the baby to be 7w6days with a heartbeat of 163. According to my lmp I should have been 11w. My uterus is completely backwards and the baby sits far back she could barely see him/her on abdominal ultrasound and had to to a transvaginal. Any way the mesurments could be off ?