I am not an MD but if the MRI/MRA were negative I would suspect that you didn't have an aneursym, that being said I think you are headed to the right place by seeing the TMJ specialist. From the symptoms that you are expressing it does sound like some type of TMJ dysfunction. Stress is certainly a contributing factor in TMJ problems. It is easy to say try to relax but maybe with the baby sleeping better you will get more quality time.See if you can take some time just for yourself.
Thanks so much!!!!!!