I have the nexplanon implant. I've never had a period, but for the past week I've been having the…

I have the nexplanon implant. I've never had a period, but for the past week I've been having the brownish discharge that you get as if you were coming off the period. And my vag has been super sensitive.

Any ideas on why it's be so sensitive!? I haven't had sex or anything for a long while.

I'm calling my doctor Monday morning to make an appointment also.