Hi momjsta,
i'm sorry to read that you are experiencing more problems with your tmj. Everything you described I have had at one time or another, sadly.
It really sounds like something caused your tmj to flare up and it could be a host of reasons - additional stress, problems getting a good night's sleep, ate something too chewy or hard, yawned too big, pillow or mattress might need changing, bite splint may need adjusting, change in medications - the list goes on and on.
If I were you, i'd call the tmj clinic and practically beg them to please see you now as you are in a lot of pain. Take your bite splint as it may need adjusting or depending on its age, replacement.
While waiting to see them, change your diet to an all liquid or soft foods diet. Try chewing and talking as little as possible. Evaluate your posture (check out
www.Nismat.Org/ptcor/tmj/ for pictures and exercises for tmj posture problems). Reduce your stress somehow and look at any medications you are taking and change a muscle relaxant (or add), etc. Also ask your fp to refer you to physical therapy and make sure to see a therapist who is trained in tmj and neck disorders.
This is about all I can suggest. I hope and pray that you get some relief soon. Take care and
god bless...
Carol