Won't start

See if you left an interior light on or your head lights on. You need to charge your Battery and then check that your Alternator is putting out at least 14.1 volts at idle with all electrical loads off. If not then your Charging System is not OK. If this all checks out, you may have a drain. That is a job for a shop who has a good electrical diagnostic tech.

charge the battery. check the battery terminals and cables. look for signs of corrosion and clean with a wire brush if necessary. make sure you have a good tight fit on the battery post when hooking battery up.