Hi this is rosa im married and hav two-year-old son..recently i have been prescribed femilon for birth control which has to.be taken on the second say of menstrual.cycle..i have used one strip a i.e. 21 tab strip..again aftee mating with my.hub forcely i audenly started bleeding what is the cause of.this pls clear me and also i have a doubt that can i use femilon as i have hypothyroidism..pls kindly clear me with this..