Is it ok to sleep on the right side?

Should be fine. Based on what I read, you can sleep on your left, right or even on your back. Your body knows when you need to turn (by waking up every single time in the middle of the night). Whenever I wake up and I'm on my back, I turn to either left or right. The next morning, baby is still so actively kicking making sure to tell you s/he is alright in your womb. But it usually depends where your placenta is planted also. Tho to make sure, just sleep either left or right.