BC that doesn't cause fertility probs later

I was on the pill for a while and decided to stop because I wasn't being responsible enough with it and decided that it's not fair for my boyfriend if I ended up getting pregnant. So now we aren't having sex at all until I get this whole bc thing figured out. Other than the pill, I'm looking for something that WON'T CAUSE FERTILITY PROBLEMS later in life. And the implant really scares me -however if need be, I will get it. Comments and advice is appreciated!