Should I be worried?

Tiffany

I'm currently 15 weeks. I had an ultrasound last month and babies heart rate was in the 150s. Went for my 4 week checkup today and they couldn't find the heart beat with the doppler so they did an ultrasound. Baby has grown tremendously and is right on schedule for the growth chart but now babys heart beat is 136 . Should I be worried its decreased??