I'm a 20 year old & I've been on the Nexplanon for 4 months. Me and my boyfriend do not use condoms or pull out. My periods are very irregular and I was on the depo shit for 5 years. What type of chance is there for me becoming pregnant? I'm not actually trying to conceive but if it happened I would be overjoyed about it. Can the implant cause you to get negative pregnancy test? Also my discharge is always heavy and milky white. It doesn't every stop. What should I do?