Thinking about switching IUDs

Paola
I have skyla since November but honestly my periods havnt changed. 
It's lighter ( not significantly lighter ) but longer and more clots come out and it's just as painful. 
Sex wise it's perfect my boyfriend cums in me and I don't get pregnant it's great but I don't want the terrible period pains anymore 
I'm very moody all the time. 
I heard mirena is better for periods and pain of period and lasts longer. 
I heard para guard is hormone free (no mood swings yay )  and works but I see a lot of people getting pregnant off it ...... 
Opinions ladies ??