I got the IUD liletta about two months ago. I had just finished my period when I went to get it inserted. I got it inserted and had a few days of spotting nbd. Then a month after getting the IUD in, I got my period (on time nbd). Now, I've been on my period for 4 weeks and it won't go away and I don't know if I should be worried or not. Help help help, is this normal????