Thank you for posting your question here, I will try to answer it to the best of my abilities.
IUD's are known to cause mood swings, it is not something new, so that could be the reason you're feeling the way you are.Contraceptive
pills, also cause mood swings and well it seems that both of them working together are really getting to you.
As such you should consider having the IUD removed.
I hope this answered your question.