Femilon is safe low dose contraceptive. Ideally using ipill so frequently is not good because it has a very high dose causing disturbing effect on menstrual cycle. It's better she shifts to a proper contraceptive. Femilon is a good choice

After your friend stop taking the pill, she may have only a two-week delay before she ovulate again...so no infertility she can relax on that part...side effects as nausea, headache, increased vaginal discharge , bleeding, fatigue, decreased libido, vaginal dryness...tell her to consult nearest gynecologists for clinical examination they will advice her best contraceptive after examination.