OK so the story is, I have an implanon implant, have had it for a year and 10 months. My periods are erractic as per conditions of the implant, but this time something feels very different. My last period started the 21st October and usually they are about 4-6 days later/extra week per cycle, however my next one hasn't started and is now 10 days overdue. Ive had nausea, food aversion, smell sensitivity, cramps, gas, Im peeing more, sore breasts, back pain etc... Ive had some of these symptoms before and usually with a period, not without, and never as severe as they seem now and ive never had smell or food aversion...Is it possible my impant has failed? Should I take a pregnancy test?