Who do I contact about lack of educational programs for special needs children?

My son just turned 3 and has been diagnosed with having Autistic features. His speech/occupational therapy expired when he turned 3 and there are limited programs here in Louisiana that can offer him the services that he needs. I am a single, fulltime working mom and the options given to me were either too expensive or having to cut into my job to bring him back and forth to a part-time school session. I feel like there is little out there for full-time working and single parents. Who in government do I contact to express my concern for this?