After watching youtube videos on singing I realized I was shouting rather than using mixed voice, and people in Punk and Heavy Metal are moreso using a mixed voice between their chest and head to hit high notes. Some of these singers could use some shouting for high notes when they don't need to, not being totally trained right in singing, but with regularly performing their songs and the strain of their vocal chords they are going to pay for it. I like singing with nobody around, so I'll keep trying to put down vocals for the short time window of time I have to do it until I get something that meshes with the song I'm working on.
Try taking 10,000 IU's of Vitamin D3 once. I've gone with barely any sunlight for days if not weeks at a time. Vitamin D is not everything, but it makes a massive difference.