Very short period, vaguely sore head and sore breasts for two weeks, neg hpt, normally have severe period cramps did not this month?

Light period. The main reason for light periods is change in hormone levels. Causes for what seems to be a light period can include: thyroid problems, eating disorders, excessive exercise, initial periods for a girl, use of an intrauterine device, oral contraceptives, perimenopause & implantation bleeding in early pregnancy which rarely occurs.
Hormonal imbalance. Menstrual irregularities are not uncommon and anovulatory cycle is a common cause. If you miss more than two periods it would be time to see your doctor. If you do not wish to be pregnant, use contraception all the time. You may consider implanted contraceptive or an IUD. Consult this site for more information on this topic. http://www.nichd.nih.gov/health/topics/menstruation/conditioninfo/Pages/causes.aspx Practice safe sex. Get HPV vaccine.

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My period is 9 days late, breasts are sore and I have cramps for a short period of time when I start exercising. I have taken two hpt both negative?

Ok. Pregnancy tests are very sensitive. Possibly you missed your period if you did not ovulate (anovulatory cycle), but also intense exercise, weight changes, thyroid, and anxiety etc, can all cause missed cycles. See Doctor if it does not come next month and you are still not pregnant by then. Read more...
You are not Pregnant. Just that there is Hormonal Imbalance and You have not had your period, It may be late or Skip this one completely. Watch for any Viral Infection, which can start as Muscle pain, Stomach flu. If you are trying to get pregnant -good. otherwise start using BCP. Read more...

Queasy, weird feeling below naval (like something is moving) period due on 8th of Nov. Neg HPT, sore breasts, period like feeling cramps but no blood?

Consider. Have you had unprotected sex since your last period?I would advise waiting until you actually miss your period on or around the 8th until you think about doing another HPT.Often HPT's done before the missed period can miss an early pregnancy because they're not sensitive enough to detect lower hormone levels.Could also consider symptoms as premenstrual symptoms. Read more...