Ok. First take a deap breath. There is a fairly good chance you can do nothing and all will be fine. The sides and back on a EA20 are made with laminated wood, pretty tough stuff. Even if there is a crack that goes thru the wood, it should be a simple fix.
If you run your fingers over the crack, can you feel a difference in height? If not it's likely just a finish crack and I'd not worry about it. If there is a crack in the wood, does it go all the way thru? You may need a mirror to look inside and see. A bit of glue worked into the crack, maybe a small cleat and you should be fine. If you do not want to tackle it yourself, a good luthier can do this in a few minutes. not a big deal.
If you will post a few pics so we can see what is going on, that will be helpful.