Toddler Hitting

Brittany

So recently my almost 2 year old has taken to hitting. She's been hitting me, her dad, our animals and her cousins. She's normally not like this and I'm not sure what started it. Normally she's rather well behaved and gentle. I'm currently expecting with our second, I have noticed she's become more clingy with me... Could she just be lashing out now that I'm closer to my due date? Suggestions on how to stop this behavior?