You need to consult with a family law attorney in the county in Tennessee where that case is. I am confused as to where your child is located. First you indicate that you left to California with your son, and then you state that your baby is in Tennessee because of the court order. How long has he been living in TN?
The problem you have is that if he is in TN, that court has potential grounds to claim that TN is the home state for your child because that is where he resides, and he has more connections there than in CA. You were only in TN for a few days before filing the TRO (which was likely filed on an emergency basis and awarded based on the written paperwork, subject to the hearing on the merits that is set in March). I think you need an attorney out in TN to advise you, because I think that TN has a better argument for jurisdiction.
However, if you can prove the domestic violence there in TN, then the court should order custody to you at least temporarily and you can seek other orders including supervised visitation to your ex, keeping your address confidential, and possibly being able to live at least temporarily in CA.
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