I'm having wierd pregnancy-like symptoms, cramping, back pain, and crying spells after a very light 2 day period. i usally have very heavy periods?

Do a pregnancy test: If you had abnormal period and are having unprotected sex you need to do a blood pregnancy test if the urine was negative and you still have concerns that you might be pregnant.

Pregnant?: The first thing to rule-out is pregnancy. You could also have an ovarian "follicular cyst", where an egg did not release and now the ovary is secreting an imbalance of hormones. This is usually self correcting unless severe pain or other severe symptoms develop. A pregnancy test, pelvic exam, and occasionally a sonogram become necessary.

Take HPT: The main reason for light periods is a change in hormone levels. Causes for what seems to be a light period can include: implantation bleeding in early pregnancy, thyroid problems, eating disorders, excessive exercise, initial periods for a girl, use of an intrauterine device, oral contraceptives & perimenopause.