Had IUD fitted what is normal please?

So I had my copper IUD fitted yesterday and to be honest was quote uncomfortable and painful but didn't last very long. So I had a few cramps after and light like brown blood which doctor said was normal. All through today just a few cramps nothing to bad to take painkillers for and then about 10 mins ago a shaper pain I be felt it before sometimes along it cycle but I'm just feeling ou5 a little as I be just taken some painkillers and I know I should give my body chance but I can't help but think something is wrong what are other people's opinion. I would really like some reassurance haha z