no need to fret. if you hatch it using the default egg incubator, its all ok. remember, you have limited space to keep eggs (and you cannot delete eggs too afaik), and eggs take time to hatch. putting in the time factor and possibility of missed opportunity to get better eggs, i'd say just go for it. hatch'em eggs!

gps connection problem. nothing to worry, and you might even encounter pokemon for "moving" around