~ Sometimes changing or stopping your method of contraception can cause a sudden drop in hormones and this can result in a change to your cycle. ~ The depo-provera injection can make your cycle irregular, however, it often stops your period altogether instead of making it more frequent. ~ The IUD can also make your periods heavier. ~ The pill and IUD can make you bleed in between periods, known as 'breakthrough bleeding' and this may be mistaken for a period. Reactions to contraceptive methods - Sometimes the pill, depo provera injections or the copper-only IUD can result in a change in your cycle.Thyroid problems - Thyroid disease could cause a thickening of the uterine lining, resulting in more bleeding than normal.Sexually transmitted infections - These can cause bleeding in between periods which can be mistaken for a period.Uterine problems such as polyps, cysts, fibroids or tumors (either benign or cancerous).Talk to your doctor about altering or stopping your medication if you think this is happening. Illness and/or medications - Some medications can affect your cycle.Stress - Exams, family argument, financial worries, divorce, even a holiday can cause a temporary change in your menstrual cycle.Ğxcessive exercise - This too disrupts hormones.ĝramatic weight loss or gain - This changes the hormones in the body and these are responsible for directing when the period will start.

Reasons for a period every two weeks could be: They are sometimes a sign of infection or other medical problem that would need treatment. Having a period once every two weeks, or twice a month is abnormal and you should see your doctor because you may become anemic if you are having very frequent periods.

Teenager getting period every 2 weeks