Help! Getting haircut tomorrow! Haircut ideas?

Ok well, I'm getting my haircut tomorrow morning, or sometime like that. My hair is REALLY thick, so I'm pretty sure you're going to suggest layers. I have 1 problem though. I've had my hair short (to my chin, no shorter) and it looked weird, because my hair "poofs out" on the ends and it looks TERRIBLE. I've also grown out my hair, and it gets poofy, extremely knotted, and I don't enjoy pulling out 1/2 off my hair everyday (literally). I've had it shoulder length also, and it helps very little. If I have it extremely short, I WILL look like a boy. So can anyone tell me how I should get it cut? Oh, and my family says my hair is straight, except my ends where it poofs out and curls but not making a curl... I hope that made sense. Oh and my hair is either dirty blonde or brown, I'm not sure, it's pretty close (no stalking me please). OK so PLEASEEEEEE help and suggest before tomorrow!! :D