My husband has stage 4 bowel and liver cancer. He’s doing fine, still working and having chemo which doesn’t cause him too many side effects. My problem is that I can’t sleep. I am only sleeping a few hours at night, going to bed later and later. My mind starts racing and I can’t relax. I’ve tried breathing exercises to no avail. My GP put me on amitriptyline but it doesn’t help. Is there anything I can do to improve this as I’m becoming exhausted.