Am I already pregnant?

I have experiencing po kasi like back pain, mild abdominal cramps, parang muscle cramps sa binti, shortness of breath, then sa breast I feel like it kind of heavy, even tho I still have 6 days before my period starts? Then sa food I always want to it maya't maya gusto ko kain ng kain even though kaka tapos ko lang kumain ng maraming meal? Tyaka may time panga na may bibilhin ako dapat bigla ako nka ramdam ng gusto ko sumuka, Tas parang mag block out minsan? Thank you for answering