what to think.

I had my period the 22nd September 2010, but from about the 29th September 2010, ive had strange symptoms, like not so much tender breasts, but achey at times, NO change in the aerola though have felt nauseous off/on, but not really tired.
Im due for AF on the 20th October 2010, i dont wanna read into it to much, but it has me really confused.

Any ideas as to what it could be????

TIA
Malibu