When you water your lawn, make sure that the top inch to inch and a half is damp. NOT waterlogged. If it needs doing every day, do it everyday. A good sprinkler is a good investment. You don't want to be doing it with a hose.
Grass WILL regrow once its established a decent root system, but turf doesn't have that strong roots when its new established so you really need to be careful getting it bedded in.
EVeryone buys turf as a quick fix solution. Its NOT. Its quickER, but not quick. The best way is the long way - prepare the soil, seed it, stay OFF it, and wait for it to become established. Ittakes 2 years or more before its a decent lawn though.
Good luck.
