Michael step one is to rehumidify the guitar so if you can't get the humidity up in your living space get a guitar case humidifier, Planet Waves makes one that I use, and put the guitar in the case with a humidifier and be sure to recharge the humidifier as needed. Let the humidity come up in the case over time. If your case leaks or has a poor seal wrap the case in a couple of garbage bags. Once the guitar is humidified then you can asses what if anything needs to be fixed.
Relative humidity is not the easiest thing for us to get a handle on in as much as there are lots of nuances that can work against us. For example warmer air holds humidity better so if your place is kept on the cool side that can get in the way of raising the humidity. Another thing that bites people is when trying to dehumidify is that many of today's dehumidifiers will not work well under 70F...
Anyway rehumidify your guitar and then assess what the damage, if any, may be. I can't tell you how many times this time of year we see guitars brought in to the shop simply because the owner let them dry out. It's probably Guitar Public Enema Number One....
Good luck