Help?

So I've been feeling really off since my last period. It was almost a week late and it was only four days long. My periods are usually like the full week. Since then I've been kinda crampy, I've been getting absolutely exhausted at the same time every night, and I haven't liked sausage since I was a little girl the smell of it cooking even made me nauseous but I've suddenly started eating it again and absolutely craving meat in general. There's been other little symptoms too and I'm really scared I'm pregnant. Can anyone help me out maybe offer their opinion. Am I just being paranoid or should I look into it?