Nexplanon advice

Okay so I need some advice.

Sorry this post is long

I am 21 years old and I’m 225 pounds. I have always been a normal to medium size always weighing 135-140 ,up until I got on birth control. I got on the pill and that was a s*** show. So almost exactly two years ago I got nexplanon (the rod in your arm) and I absolutely love it except the weight gain. I have stretch marks all over my body because Within the first 8 months I gained 40 pounds. And then 2 years on it and I am 225 pounds and it doesn’t matter what I do I cannot loose this weight. I worked out for 4 months straight and could only loose 15 pounds. I eat very clean besides coffee in the morning. I love nexplanon because it gives me freedom to be with my fiancé without having to worry about condoms and pills and shots and that weird thing they stick up your vajazz. And it’s made my skin stelar ✨ and I only have a period once every 4-6 months. I did a bunch of research and literally everyone on it either gained a bunch or cannot loose any weight or both. This is the biggest I have been my whole life and I’m always so so tired. I even went to the doctor over the fatigue and she said sence starting nexplanon I have developed a vitamin d and b12 deficiency. I just want to fit in my size 8 pants again. I have one pair of pants left that fits me 😭. What should I do. Should I keep it in and wait it out because it comes out next September or should I take it out now. Or does anyone on it have any tips on how to loose this weight healthy bc I have legit went to a diet doctor and nothing is working. I don’t expect overnight results but it’s been 6 months of clean eating and I’m over it 😞😞