Swelling, Am I pregnant?

Patient: The inside of my vagina is swollen; no pain, itching, odor, or anything else. I am also late, first day of my last period was December 30th. I have taking urine test, including one at a pregnancy clinic. All negative! Could the swelling be a pregnancy sign or is something wrong?

Symptoms: Slight cramps a few times a week, headaches, fatigue, light headed, heart burn, itchy breast and lower back pain.