So lately every time I have sex dark brown clumpy discharge begins to come out. It grosses out my boyfriend and I have no idea what it's from! I have a nexplanon arm implant and also around the same time the discharge after sex happened the nexplanon started to get itchy on my arm. Could be coincidence or could be because I've been stressed and don't normally have a period. Is the coincidence enough to see a doctor? The itch has gone away over a week but the discharge has not.