Hi, Amanda, and welcome to Tinnitus Talk!
I'm sorry you're having problems with tinnitus worsening after pregnancy. You're doing the right things by going for tinnitus retraining therapy and wearing the device. Those are positive steps in the right direction! Hard to believe, but over time, tinnitus really does improve, especially if you have a positive attitude and don't spend too much time thinking about it. Easier said than done, that's for sure, but most of us who have had tinnitus for awhile find that to be true.
My daughter, who is 32, had her first baby almost 10 months ago, and the tinnitus started for her during pregnancy, too. It still continues, but so far, has not gotten any worse. Please remember that your body has gone through many changes, both during and after pregnancy, and that after your hormones "calm down", your tinnitus may calm down, too.
Are you still nursing your child? It could be that after your child gets older and is weaned, you may notice a difference in your tinnitus.
How would you describe your tinnitus? You mentioned that it seems like "head noise". Do you have a pulsating sound in your head, like I do? I have both ringing and pulsating -- I, too, had mild tinnitus, but it got much worse after I took blood pressure medicine for the first time.
Both of us may have suffered a kind of trauma that exacerbated our tinnitus. At least, that's my theory! Please keep us posted on how your TRT is going.