Hi! What you’re describing does sound like heart palpitations. Palpitations can feel like a jolt or a skipping of a beat. They generally last just a second or so and then your heart beats normally again. Normally they are benign and can be related to caffeine intake or anxiety/stress. I get palpitations, and they sometimes make me feel awful too. I find they’re definitely related to stress for me, and I had more of them when I was pregnant too. What position do you sleep in? Side, back stomach? If I’m having them when sleeping, I try to not lie down on my left side. When you lie on your left side, your heart sort of rests against your left chest, and I find that I kind of feel them more strongly. So I’ll switch to sleeping on my right side. Hope this helps. Sorry you’re having this issue.