Hi, Chevy.
Sounds like your gauge is Kaput.
I tried to find an accessory shop in your area, no luck - dozens of auto repair shops though, seems like you live in Crash City.
If you are OK with mail order try www.jcwhitney.com and search 'Tire Gauges' or 'Tire gages', they have a good selection available. Looking at the pictures you can chosse the one that suits your needs best. Most gauges are accurate to within a percent or so. If wanting a dial gauge, choose one that has a display which has your normal tire pressure displayed in the middle to upper range of the dial. With the electronic liquid crystal display type (my preferred type) go for the one that will mate with your tire stems the easiest. Most LC units are accurate to around 0.5 lbs/sq in and, in this case, any pressure within the working range of the unit will be clearly shown.
HTH
Ken.