Disclaimer: I am licensed in California only, and we cannot provide specific legal advice in this forum because no lawyer-client relation exists.
An action in tort for assault requires the aggressor present sufficiently violent behavior: this usually requires words AND deeds. For example, an aggressor simply yelling profanities and screaming threats to bash one's head in, is not going to be enough. Besides the violent yelling and threats, the aggressor needs to engage in behavior and actions that present a credible threat of imminent bodily harm to the victim. For example, yelling from across the room, and then rampaging over toward the victim as if lunging in an attack with raised fists (whether he actually attacked or not).
One of the key components is the victim must have experienced actual fear of bodily harm.
This seems to closely resemble your narrative, so I would encourage you to consult a qualified lawyer in your local jurisdiction.
Assault is an intentional tort, and besides pain and suffering damages, it opens the potential for punitive damages.
Also, there is is the tort of infliction of emotional distress, with symptoms such as you describe: heightened anxiety, sleep disorders, constant fears, up to post traumatic stress syndrome. Your time out on disability, and medical records will help substantiate that you suffered physical symptoms as a result of the assault.
Infliction of emotional distress is either intentional or negligent.
Usually, it will be negligent infliction; to substantiate intentional infliction, one has to show the aggressor knew the victim was unusually vulnerable to such trauma, or actually intended the victim suffer long-term physical discomfort/fear/etc. Intentional infliction opens the door to punitive damages, but is hard to prove.
Again: I urge you seek local counsel soon to be in time for any limitations period for filing an action.
Hope this helps -- if so, please rate me positive! thanks!