I have had mine in for almost two and a half years.
Only because I am too scared to get it taken out. Not long until I have no choice about it. And the false hope encouraged by the doctor that things would get better and settle down.
I had it put in after LO was born. At the time he was just a few weeks old and I was in my pre-pregnancy clothes (they fit just fine only a few days after he was born, and this is relevant).
Within a week of getting the implant they were suddenly too tight. I am now two stone overweight and two dress sizes bigger.
I haven't changed my eating habits.
I cannot remember when I last had a period. But at the beginning I was having periods that lasted an entire month/five weeks and then having just two weeks without one before the next one started.
I hate the implant. There is no way in hell I am having it replaced and no way they are going to give me any sort of coil. I got pregnant while taking the pill. DH refuses a vasectomy. We both hate condoms.
The only answer is to give up sex, which thanks to the implant is not going to be a problem for me, I have almost zero interest in it anymore.
So no advice OP, but YANBU and you are not alone.