I am on my second shot for the depo and the first three months I didn’t get any spotting or a period now I’m on my second shot and I have dark brown discharge and every time I have sex I bleed briefly then it goes back to brown discharge how long may this happen for? And does the shot cause issues with fertility I’ve had a ton of issues regarding periods in my life and trying different pills till I finally tried the shot but my biggest fear is not being able to have kids