Reason being... I had it put in at the end of feb had periods for 1st two months but then they stopped (which can happen. I am now very nauseaous recently and have put little bit of weight on.Have had terrible headaches, all of which reminds me of being PG with DS. Done two pregnancy tests but both negative (week apart). Feel like I'm crazy as it has a very effective rate just wanted to know if anyone had heard of anyone who was PG after using implanon?