Hi Texasgirl, I am a hairdresser and with what you've described, there aren't many options for you. If it's over processed, it's over processed. There are products that can help, but if honesty is the best policy, they are only temp cover ups and involve professional products like Lanza/Nex/Redk/Matrx/PM/Seb/etc. PM has a foaming styling cream but since your hair is so fine, after buying it from your HD [as I don't think it's available to the public] you'd use only about the size of a pea on your wet palm and then massage it into your wet/towel dried hair. If you use too much, you'll be in for a mess as once it's there, it's there. My customers used to grab it for themselves when I left my station and palm it into their hair, like quarters' size worth, and then their hair was ruined. So beware. Another product is Emergency and one is called 9/11.
My hair is very thick, very curly, very coarse and almost impossible to ruin but very thin fine hair is very easy to mess up.
I would get a spray bottle that is about 1 cup of bottled water, get it pretty warm [as it has a better change of getting into your] put in there 1 teaspoon olive oil [good quality] and give the sprayer a good shake, very vigorously, then spray your wet hair with this, use a plastic shower cap and leave on for an hour or more. Olive oil is way larger than the cuticle of your hair therefore, most won't be able to penetrate but the little tiny amount that can, is an old addage from years ago as a quick/healthy fix for deep conditioning frizz control.
Good luck.