Wow! A similar situation I can relate to. I am a 39 y/o male with very similar thoughts of doom. I fight these thoughts daily and try to keep busy with work so I don't think about them. I too, feel like I'm dying and have a consistent dry cough. I only experience numbness in my hands when I sleep but I think its because I cut off the circulation to them by my sleeping position.
My husband is also 37 and taking lisinopril. He has been terrible to even be around. This stuff has him so messed up he refuses to believe that it is the meds. He won't talk to me, I'm just observing his behavior. He looks crazy. He mumbles to himself, very anxious, very aggitated, loss of patience,horrible temper. I think he is going to lose his mind. I tried to get him to come off this stuff and try a different one, but he thinks he is fine. It seems to me he tries to keep busy so he won't have to talk to me anymore. I have threatened divorce to get him to just go to the doctor,he won't go. I guess all I can do is wait for the refills to run out. That is if he doesn't hurt himself or me or the kids first- or have a heart attack or something. Now he is drinking like a fish-beer,liquor,wine. This just makes all the symptoms worse. I want hm to get better-but I don't know if I can handle another 4 refills!!!!