paragard and extreme weight gain?

So I have been reading up on if the paragard could be causing my weight gain. Everything says it shouldn't because it has no hormones but I've read that a few people do gain weight but it seems that a lot of those women have had it over a year. I have been browsing this site and find it to be the best place to get other peoples opinions.
So here is all my information. I am 22 I was on the pill from 18-21. I never gained any weight on it but it made me extremely moody and bipolar. I stopped BC all together for about 10 months. It took me 8 months just for my system to become regular. I chose paragard because it is hormone free, and I really liked the idea of an IUD. So I started my period and I went to have it put it. I was never informed to take ibeprophen or anything before the appointment for the pain. Well it didn't hurt that bad, but at first my Dr wasn't sure if he would be able to insert it. He had to dilate my cervix, odd because I was on my period. He got it in and I was done.
so now the weight issue. I have always been 125-130lbs. I eat right and exercise. I weight myself daily just to know what it is. When I went to get the IUD put in I was 132. Normal weight gain for my period not out of the normal. It jumps up and then drops back down to around 125. The next day and 3 days following the insertion I was extremely bloated. It was uncomfortable to move, nothing fit, and it hurt just being that bloated. I was at a whopping 140lbs!!! 10lbs over my normal high weight. That's when I really started to read into the problem. I expected the bloat to go down with time and it did. But the weight is still there. I added more exercise to my routine, still eating right and getting enough calories. But I keep gaining weight. It has only been 2 weeks after the insertion and I'm now 145!!
Has anyone else have this big of a change directly after insertion? Will the weight go down after more time to adjust?