Very dizzy..

I know that I can call a doctor but I like to hear things from real people first who have experienced the same thing. I know health is different for everyone but still. Anyways, this morning I woke up and the room was spinning around me really fast, I was really sweaty and felt like I was going to vomit. So I tried to lay back down and that only stopped it for a little. I woke up again to it happening just a little while ago and it worsens when I lay on my left side. The spinning is extremely worse on the left side. And when I walk, I feel somewhat off balance. I googled things and some people say Vertigo, some people say panic attack, and then there's the scary stuff saying go get checked for a brain tumor ? So has anyone else experienced this? And what should I do?