Fatigued, very irritable, moody, breast soreness, mild chest pain, missed periods, fogginess/ trouble concentrating, i feel so off!

Merits evaluation.: Anyone with your symptoms merits a thorough medical examination, including a careful history, physical exam, ekg, urinalysis, blood tests, pregnancy test and possibly a chest x-ray if there's no chance you are pregnant. In all likelihood, your doctor will then understand the underlying cause of your symptoms.

HPT: Since you missed your period - would encourage you to take a home pregnancy test. It is inexpensive, easy to get & accurate.