I Am Looking For An Antidepressant Because I Cannot Sleep.

I am looking for an antidepressant because I cannot sleep. I have diabetes. I am allergic to many or all sleep medications and have gotten fast heartbeat and palpitations from klonopin, ambien, and xanax. I was taking trazadone and because my blood sugar has gone up I am stopping that to see if that is what caused it. Do you have any suggestions>