Hey thanks for your faith in the health care magic.i have gone through your question and understood your problem. it is advised to take Rigevidon within the first five days of your cycle. Birth control pills do have side effects but they vary from individual to individual, it actually depends on the body system and the duration of the intake. Some take it quite comfortably while others suffer from side effects. The side effects are symptoms like depression, weight gain, loss of libido, breakthrough bleeding, chloasma, menstraul changes, skin reactions, etc. Keep yourself well hydrated and take care of your diet, exercises and sleep while on pills. You can limit the use of birth control pills and use barrier methods for contraception if you feel you are getting affected with the side effects or weight gain. You can consult your gynecologist before switching on to other pill or contraceptive device. Hope I have answered your query. If you like my answers and wish me to answer in future, bring it to my attention