Hello , my name isXXXXX and I will try my best to provide you with the answer to your question.
It is impossible to say from here whether your symptoms are all related to the tooth but nevertheless it does sound like the tooth pulp
is exposed or infected.
Having said that, an abscessed tooth can cause generalized systemic infection and that can be , in fact , life threatening. Fever, chills, malaise , rash and tooth pain
and swelling would indicate a serious problem that should be addressed as an emergency
I would highly advise that you get to a dentist/oral surgeon as soon as possible to have this professionally assessed and attended to. If none is available you will need to go to an urgent care center or and emergency room but they will only provide antibiotics.
The cure for an abscessed tooth is root canal
or extraction. Antibiotics may be advised before but will only lower the level of infection for a while and not cure the problem.
I hope this helps. Please ask more if I can help you further.