Help!!!!

Deone
Hello all, i am in need of birth control and abstinence is not for me, and i have tried Mirena 2X and had to go to ER to have it removed due to the major pain that it was giving me, the pill i forget to take it, the shot i blow up and the am not ever cutting or tying/burning anything. But am currently using Nexplanon to be removed in June 2017, and am over 35, any idea i will greatly appreciate the info. I dont want my body to get used to the Nexplanon and stop working, please help. And at the moment do not plan to have anymore children at this time in my life!