Fear and anxiety

Our 6yr old mini schnauzer has become increasingly fearful and anxious over the last few weeks. She's always been terrified of loud noises but usually gets over it. Lately, every little noise (distant thunder or firecracker, back fire, distant gunfire from the shooting range) sends her hiding, shaking, panting with tail tucked. She won't go out at night to potty before bed. She is able to hold it but I know it's not good to go 12hrs without peeing. She has always been very sensitive. When my hisband looses his temper she gets all upset. Now she seems to stay on high alert for anything. She doesn't seem to want to play any more either.