You may see no blood at all. Most women like this when they understand it is common. Some women taking combined pills may experience side effects such as headaches, depression or decreased enjoyment of sex. You must use a backup contraceptive for 2 weeks if you have missed pills and are uncertain the number that you have missed. Serious complications such as blood clots may occur but are very rare.
Pills require a prescription and can be expensive.
Pills may promote growth of breast cancer but probably do not cause breast cancer. In the United States combined pills require a prescription. You can get pills from your doctor, nurse practitioner, nurse midwife, health department, or family planning clinic. Not all clinicians know about emergency contraception. Some of these sources of help may be free.