Missed period after IUD removal!

Aubri
Okay ladies so I got my marina IUD removed in the beginning of March and had my period directly after for about 3-4 days and have not had it since then. It has been 3 months now and I'm getting concerned, has anyone else experienced this after having an IUD removed? 
*Also I have been taking pregnancy tests almost weekly just to be sure and they are all negative.