I had an IUD...it worked and I too had spotting but it was just because your body is trying to push out a foreign object, the spotting does stop. Birth Control never regulated my period so I stopped taking the pill. As of May/07 i got my tubes tied, periods are lighter BUT BUT...I have PMS now, never used to before the tubal. Now I get cramping to the point Im crying, blood clots and if you look in the dictionary for the meaning of BITCH...you'll see my pic. All the research I have done about the after effects of a tubal, if I knew then what I know now I wouldn't have gotten the tubal done. Going from NO PMS to being a complete BITCH, and I mean BITCH, I wish I can undo it but 9/10 dotors won't do a reversal tubal. I wanted a hysterectomy but the OBGYN said no cause Im going to go through Menopause in a few years so we'll just do a tubal.
So if I could do it all over again...I would opt for the IUD. It worked for me, but it effects each person different.
Hope this helps/ed.
(P.S) I am 41 with NO kids and CF with CFRD