Pains when sleeping/ waking up

Does anyone else have weird pains when you wake up or in the middle of the night? I keep waking up with my back in a lot of pain or my stomach feeling like cramps (i guess from sleeping or moving weird). I also keep waking up and my tailbone hurts and I am not sure why. I’m sleeping on my side and using a pregnancy pillow to stay on my side because I am usually a stomach sleeper. This has been super hard on me to get used to. Anyone else feel the same?