The exact same thing happened to me last week! I had started to feel the baby move from approx 15 weeks and the movements were getting stronger each week. But last weekend I hadn’t felt the baby move and I started to get myself worried. I gave the hospital a call hoping for a little reassurance. I did sound worried and I mentioned to them about my nightmare I had that night so rather than let me worry they wanted me to come down. We heard bubs heart on the doppler straight away!
They were fantastic, I wanted to cry because they made me feel so at ease. The midwife made me feel like I was helping her by being there and letting go of my worry.

She mentioned that the uterus (I think she said uterus) could be moving and that’s possibly why I didn’t feel the baby. But as soon as I left the hospital the little bugger kicked me!!!!!!!

So if you are worried please go and see your doctor.