I got my mirena removed on July 2,2014 and we have been trying since

I got my mirena removed on July 2,2014 and we have been trying since. We didn't have much luck month to month and I started not following my "fertility" days so much and began to think "whatever." And "I don't think it'll ever happen" every month my period has been late according to my fertility apps. I was supposed to start my period on December 28th. Thinking that I would get it today I took a pregnancy test just for fun and it immediately read positive! I wasn't really expecting it and just started balling like a baby! It has been a terrible 4 months for my family and my little brother who lives with us just came home from the hospital after spending 6 days there including Xmas. I am so excited!