5wks5days supposedly but couldnt see anything on U/S

JoJo⛥⛥⛥
Is this normal. Tech said I maybe too early to see on U/S. She did say she see something that is trying to form due to the placement in ly uterus(see circled section in pic). She suggested to come back in a week. I went home and tested again and still positive. Has this happen to anyone? When were you able to see the gestational sac? Should I be worry?