I read all the other responses too and other than telling you to quit feeling sorry for yourself and call the schools, I didn't see a lot of help for the question you asked. Sorry, not trying to offend anyone else. As L.M. said, you need to send a letter to the school, the superintendent and to the Texas Home School Coalition. The address for the THSC is PO BOX 6747, Lubbock, TX 79493. They can help you if you run into legal issues with the school district.
Send the letter to the school principal by CERTIFIED MAIL, RETURN RECEIPT so you can ensure they actually receive it. Get this done right away. Send a copy of the letter to the others, but not certified.
Next, since you are ok with him attending public school and you obviously have access to a computer, enroll him in a FREE, Public School at Home, such as www.k12.com or through Connections Academy at http://texas.connectionsacademy.com/tx/geosearch/tx--enro... This way he is enrolled, getting an education and you don't have to worry about transporting him. He is still considered part of the public school system and they provide all he needs as far as materials. I'm not sure if you can enroll him this late in the year, but if not, then you can withdraw him as a home schooler and finish teaching him at home for the next 2 weeks via free educational info on the internet, then enroll him in this if you need to going forward.
Texas has no reporting requirements other than you notifying the school district that you are going to home school. As long as he was enrolled in public school the previous school year, you can enroll him in the free public education at home type schools for next year.
Sometimes things get hard and we don't know how to get out of the situation right away. We don't all know your entire situation and shouldn't judge. I certainly will not as I have had my own share of struggles. If you need more information/advice, please feel free to message me and I will tell you how to contact me. I'll say prayers for you and your son. Blessings to you both.