Lower heart rate ?

Gabby • 💕

So today I had a scan at 17+6. The doctor tried to get measurements but baby girl was scrunched up in a ball to one side. All she could get was her head, which I’m assuming was fine because she didn’t say anything about it. I’m a little concerned- even though she didn’t say anything about this either- but the baby’s heart rate was only 135 today. I know between 110-160 is normal but her heart rate is always in the mid to upper 150’s. Should i be worried or do you think it could be lower because of the fact that she was sleeping and or the position she was in?

Sorry to be that person but this is my SEVENTH pregnancy and I have no living children. Everything worries me. Pic of baby girl just because :). This is the best the tech could get as she would NOT budge for us.