So my boyfriend and I just use the IUD as protection. On an IUD u can have lighter or no period. Until this month I was getting my period regularly between the 28th and 31st days of my cycle. He doesn't withdraw all the time either. But this month I didn't get a period and I'm 12 days late. I felt very hormonal maybe 5 or so days ago, but it's weird that I got no symptoms. I took a pregnancy test and nada and tht was this past Saturday. He suggested taking another one, I don't feel pregnant? Nothing has changed but I am late. How concerned should I be?