My son was diagnosed with High Functioning Autism at age 2. Call Ester Seals NOW - call the school district, call One For Autism, on Huebner, and ask for any references for child care. If you son has autism or anything on the spectrum, you will need help, and support. There are not that many child care facilities that are capable in dealing with children with special needs. One that I have heard about, but cannot give any references for, is Mi Casa in the Medical Center area, I think it is on Ewing Halsell, or somewhere near there.
Get on the web, check with the San Antonio Autism Society, One for Autism will have the name/number of the person who is head this year, and check with them to see if there are any recommendations.
The double edged sword you face is that children with Autism do best in a blended environment - where they are surrounded by children who are typically developing neurologically for them to model their behavior and learn what is appropriate. Hate to tell you but this is not fun, it is not easy, but when your child makes step by step improvements, it is worth it.
Buy the book The Out of Sync Child, check on Amazon.com. It is a fountain of information even if your child does not have autism - the sensory issues affecting children can be overwhelming.
Call 211, that is a United Way hotline, and they may have good recommendations given your circumstances. Hang in there - be nice to yourself, this is not your fault, and stay healthy-eat right, exercise, and take yoga - all will help you deal with everything you are facing. If your child does have Autism or something on the spectrum, get the following: 1-a handicapped parking tag application from your pediatrician, and take it to the DMV asap, and two, meet with your personal physician and get on an antidepressant. Don't wait until you are exhausted, overwhelmed and unable to function. Too many people depend on you, and if you are ill, immobilized from exhaustion,fear, guilt, stress, you will only hurt yourself and your child. Go to the Autism Society Meetings every 3rd saturday at Lutheren Shepard of the Hills Church on Wurzbach, and call Any Baby Can as soon as possible and get a case manager through them - they can help navigate this path for you. God Bless.