6 weeks(maybe?) and nothing on u/s

So I went to an ultrasound boutique to see the baby. I got impatient as my doctor’s appointment isn’t until the first week of February. I regret going. The tech did a transabdominal u/s and said she didn’t see anything. She said my endometrium looks thick (the black line on u/s) and looks like something is forming. She reassured me and said that I could be just not as far along as I thought. She recommend getting bloodwork done if I’m worried. I am waiting until my doctor’s appointment to get blood work done. I haven’t spotted or felt any different. Should I worry?