That's because of the breakup. Me exwife haven't been so nice to me, I went 3 months with less or no sleep. I took her 4 times cheating me after the first time I discovered that she had another man. And it's not only me, her nearest family still do not sleep well. Her mother is taking this very hard. So that is why I am going to a Psychologist. It's hard to experience a breakup like mine. Trust me, it's not normal.