Could I be pregnant?

 I have pcos when I was first diagnosed when I was 19 I would go months with out periods. I'm now 22 and have had regulated period for about 2yr.s I might end up being off a few days according to the prediction but it always comes. Now I haven't had a cycle since October 11. I've never been this late. My husband and I have been trying to conceive for years. Also I'm noticing that I get a nauseous feeling and dr pepper is the only thing that calms my stomach. And I'm constantly eating like no matter what I'm always hungry. I haven't taken a test yet I don't wanna get my hopes up. But does anyone have any suggestions or ideas as to why this is happening