I bet your confused hun, go to the doctors asap and get things sorted out, obviously tests arent always right but you need to see or speak to someone about it incase it is something else.
Yeah I agree the docs should be able to tell you for sure. It's difficult to know with a home pregnancy test because they only work about 2 weeks after you've concieved and since you use contraception you wont know when that is.
It's probably not a pregnancy though because it's very rare to get pregnant with the implant. Even more rare than the pill I think.
Good luck andI hope it all goes well for you. xxxxx