Ultrasound question

Ashley

Hi ladies! Currently 7 weeks with my 4th pregnancy after 3 losses within the past year. Last week I went to my fertility doctor and they did a transvaginal ultrasound where i was measuring 6 weeks. Saw a heartbeat and everything looked perfect. My OB wanted to see me today where i had an abdominal ultrasound. Measured 6 weeks 5 days and had a heartrate of 124. Is it normal for there to be a bit of a discrepancy between abdominal and vaginal ultrasounds? Kinda freaking out over those two days. Thanks so much!