re: Insomnia. What can I do about this? Will I die?

Get some lab work done and go to a sleep specialist, there's all kinds of things that can screw up your sleep and you want to make sure the right issue is being treated.
Anti histamine sleep aids have been linked to some dementia so be mindful of the risks. There's an app for Apple Watches that tracks your oxygen saturation levels, it can be beneficial if you suspect sleep apnea.