Period symptoms

So this month my period hasn't come on my usual day and my symptoms are different. For example in usually really down and don't eat but this month I'm eating normally, and have such sore boobs!!!
I get bad cramps usually but only once I've actually started, but I'm trying another type of medication to fix them so it's understandable they're. Not as bad but for real I was vomitting today which I usually do with cramps which I didn't have. 
Defo not pregnant is this just a random hormone month or could something be wrong 
For anyone who actually understands what I wrote then congrats because that grammar was awful 😂😂