Anyone with an IUD...

I know they say the first 3 months will be some cramping and spotting. But the cramps I'm having feel like I'm being pinched in my uterus and they are on the left side and they hurt. They usually hurt so bad I stop what I'm doing, and I have to catch my breath when it's over. I asked my doctor after a few weeks of having it in and she said it's in place and to give it another 90 days. But I'm worried about it puncturing me, so I'm considering having it removed. Anyone else have this issue?