Needing some reassurance!

I had some spotting last night at 6w 2d. This is the second time I've had spotting - the first time they tested my HCG levels and they were good (jumped from 700 to 1700 in 48 hours)! This time they brought me in for an ultrasound (6w 3d). She said baby is measuring at 6w 1d, which makes sense since I ovulated on day 16 of my cycle, and that the heart rate was 113 bpm. She seems happy with the results, congratulated me, and I left! And then I decided to start Googling, because that's what I do, and I got kind of concerned that the heart rate is low. So now I'm just looking for ladies in similar situations who can offer some reassurance, because I want to stop being worried all the time and just enjoy this pregnancy and the idea of growing a tiny human in me! ☺️👶🏻