Only two causes for the symptoms you describe... Lack of airflow through the evaporator(indoor coil), or low charge in system. Usually, though certainly not always, a problem that happens to occur suddenly..."It was working fine yesterday" etc... is electrical in nature.
From your description, you mentioned that the indoor fan will not run. If true, that is most certainly the cause of the problem. No indoor blower equals no airflow. Could be the motor itself, the capacitor, or the control circuit for the blower. Not many options for troubleshooting exist for the average homeowner where this is concerned. Time to call the pros.
KennyD