I have the implanon in my arm, have for 6 mnths now, i havnt had my period at all since having it, an the other day bout 2pm i got a cramp, i shrugged it off coz people get cramps all the time, then prob 3 hrs later i went to the toilet, there was nothing in my undies, but when i wiped there was alot of blood, when i looked in the toilet it was full of blood, i havnt had any bleeding at all since that. an since that iv been very tired an run down