Hello ladies ummm some advice would be great. I'm going out of my mind!

Alright my last period was Feb. 17 and it lasted five days. My husband and I are very sexually active and I have been using the Paragard IUD since Nov. 27, 2013.

On March twelve or so I went to the restroom and when I wiped there was a tinge of blood but it was very light it was more pink than red. I had also been experiencing some intense cramping so I figured it was AF knocking. Well it is March 24th and still no AF. I have no cramping except for some pain on my sides by like where my ovaries are and yes its a pain not a cramp.

I have taken two pregnancy test on the 20th in the morning and one today in the morning both are negative. Any advice from you lovely ladies would be greatly appreciated :)