Had implanon insertion. Chances of miscarriages?

hi,ive had implanon put it last august,and ive had periods every month,and cant remember last time ive had it,think it was in march but not too sure,i was wondering if i could be pregnant? or is that normal? I heard about women having miscarages while on implanon and im a bit worried.I dont think ive got any symptoms of being pregnant,but i ive had pregnancy symptoms when first had my implant inserted so i cant tell if i feel any different than usual,expect that i go for loo more often. I would be greatfull if you could help.thank u