I am 36 years old, and i have an 8 year old son. I was 4 days delayed before my period came (the…

I am 36 years old, and i have an 8 year old son.

I was 4 days delayed before my period came (the usual 5 day period). It's now been 5 days after my period has ended and my breasts still feel sore and heavy. I have occasional backaches, headaches at night, dizziness in the morning, stronger sense of smell, and sometimes abdominal cramps. I took PTs every other day, all we're negative. I am in an LDR relationship, I've been taking Vitamin E and Folic Acid for more than a year. Is it possible that I am pregnant? Or is there possibly something wrong with me?

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-fis