I went from an IUD to an IUS around a year ago, I'd only had the IUD in for around a year when the excessive bleeding became too much and they recommended the swap. Since having the IUS fitted I have gained around 2 stone which I cannot shift, my skin is terrible and I'm a moody horrible psychobitchfromhell type 
Would it be very unreasonable to ask them to switch me back to an IUD and just prescribe mefenamic acid and tranexamic acid from the start? I've given this coil a year but it really isn't suiting me.