6 week fetal heart rate

I went to the doctors yesterday and got a sonogram because I have having bad cramps and pain on the right side of my abdomen. He did a sonogram and I got to see the heartbeat for the first time.. incredible ❤️ He said everything looked great, the baby was measuring great but the heart rate was a little slow.. the baby's fetal heart rate was 108.. from what I read that's a normal heart rate for a baby at 6 weeks. Is 108 too slow or normal??