I need your help ladies!

I had my Mirena IUD removed January 11th and got a regular period January 13th. Since then I have not received my period. I took a pregnancy test 10 days after my 1st missed period and again 15 days after, both negative. I called my OBGYN office and they told me it's normal to miss periods after the IUD removal and if I don't start a normal period after the 3 month mark to call them back. 
Well since that phone call my period is now 2 months late, my boobs are sore, I'm constantly out of breath, constant headaches, more fatigued then usual, lower back pain ... but I can't bring myself to take another test out of fear of it being negative! My husband and I are trying for baby number 3 so the hopes of a positive only to read a negative is depressing! 
Have any of you ladies ever experienced this after an IUD removal? What was the outcome?