Need reassurance....

Went for my first ultrasound today... According to my last period I should be 7w6d.... My Lil peanut is measuring 6w2d, the said the heart beat is slow, but what it should be at for 6w2d... I go back in for another ultrasound in 2 weeks, to make sure the baby is still growing...

Anyone else go through this and everything be ok? This is my 2nd pregnancy, and my first was a breeze, basically a step by step pregnancy....

Just looking and needing some positive thoughts.