On 20 August 2013, got my implant put in and it's due to come out on the 19 August 2016. Since I've had it in, my periods have occurred around the 25th of every month. I didn't have a period on 25 October and it's now the 5 November. Is there something wrong with me? I don't feel ill or anything, I have really bad stomach ache at the moment but that's it and I've not come on. Thanks in advance.