Hi I Have The Contraceptive Implant. It Has Been In

Hi
I have the contraceptive implant. It has been in for over a year and I am experiencing:
Prolonged periods
Dizziness
Sickness
Mood Swings
Depression
Headaches
Tender Breasts
heavy arms and legs
severe tiredness
I really want it removed but do not wish to get pregnant. I have tried the coil, the pill and do not want to try the injection as can see it would be the same as the implant.
Is it possible, as I am 39, I am married and have 2 children, that I can be sterilised?
Thanks - Anne