Sore boobs and bad cramps

Si

I should have my period now, and it's soon a month since I've got a light hormonal IUD. For two weeks have I had sore boobs and now I have much worse period cramps then I ever had earlier. Painkillers doesn't help.

I have no bleeding yet. (Just the spotting)

Is it normal to have so sore boobs and so much more cramps?