Could I be pregnant after implanon ?

I had an implanon for 6 months and after the 1st month my periods were heavy and irregular like 2 weeks a month or one week off a few days and then start again. after several months I became VERY moody and irratible and the cramps were unbearable..they were actually contractions for the last month. I had to get it removed due to the long periods and moodiness...I have mild depression and the implanon made it worse. Well it was removed Monday and here a week later I am even more tired...I feel happier though just tired. I bled for 4 days after it was removed...but now and weeks before it was out i am just so tired and want to sleep all day. What are the chances of being pregnant?