I'm sorry to hear about all the stresses you're going through. Another member already mentioned going to therapies, and I think that sounds like a good idea. I assume your job allows you benefits, and as I have learned, there are a LOT of different types of therapies out there.
My mom is seeing a chiropractor right now for ringing in her ear and neck pain, and it's helping quite a bit after a month (although she's not head injured). There are also vestibular physiotherapists, craniosacral therapy, osteopaths... It may not make everything better, but at lease it could help. Hopefully your appointment with the neuro goes well and they can give you some more guidance on treatment.

My relationship also just ended last month, we weren't married, but it still sucks.. feeling like you're not a whole enough person to be with someone else..

Sending healing thoughts your way.