Waking up in the middle of the night

I havent been getting quite enough sleep lately but tonight I've been waking up every hour basically in a panic attack, for no apparent reason. I feel absolutely restless like I have bugs under my skin. I never have a problem sleeping, sometimes falling asleep is hard due to minor aches and pains but I've never had a problem with staying asleep. It's absolute restlessness it feels like a panic attack but there's no apparent reason for any of it. My natural instinct is to take a sleeping pill or drink chamomile but those aren't safe while pregnant. But that's the urge I get, like my body is telling me it needs help to get back to sleep and to relax. Does anyone else have an issue with this? It's miserable. My mom mentioned she had this problem due to restless leg syndrome during pregnancy and it does feel the same, it feels like restless body. Like I said, it feels like bugs under my skin.