Get a lawyer involved. You won't get much without one. You need to plead for and prove you are entitled to whatever relief you want.
I am not intending this to be legal advice, because I don't know the particulars of your situation. Call me if you would like to discuss this or other isues.
Please consult with a good family law attorney in your area. Dallas and Plano have lots of good family law attorneys. Whether you can get temporary spousal support depends on a lot of factors that you did not provide in your question. For example, it seems like there has been a temporary orders hearing (or two)--why didn't temporary spousal support come up at those times?
Please consult with a local attorney who can look at your case file and give you detailed advice carefully tailored to your exact facts.
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