Ultrasound reassurance please!

Hope

I went to the doctor today for an ultrasound and I’m only 6 weeks and on the sonogram they measured a fetal pole and the gestational sac at exactly 6 weeks but couldn’t really get a heart beat or a good picture. Is this normal? I have had 2 c sections also so idk of scarring could get in the way. Any feedback is much appreciated! Thanks ladies!