"i have been on nexplanon for a few months now and i either have a 2 week long period, a one week long period that is followed by a few weeks of spotting, or i have a 2 week long period followed by two to three days without bleeding at all then spotting followed by two more weeks of a period. i have not been able to have sex because i am always bleeding or spotting. i have no idea if this birth control works for me because i haven&#039;t been able to have sex and try it out. everyone is different though, i have had friends with the same problem as me and friends that do not bleed at all. you will never know what will happen until you try it. i have not gained weight so that is a plus."