I'm 34 Years Old My Last Period Was On The

I'm 34 years old my last period was on the 10th 03 2016 I was supposed to get my period on the 6 April but nothing until today I'm having hot flashes sensitive to smells and tired all the time and in my whole since I got my first period I have never missed even one anless I was pregnant and I took a home pregnancy test it said negative I have no idea what's wrong with me