My head has a lot of pressure, my hears hurt, my teeth and jaws are killing me, my nose hurts. a lot of weaknes and fever. can it be a sinus infection?

Sinus infection: Could very well be a sinus infection. If you have a clear or yellow discharge it is probably viral and treat it like a bad cold. If the discharge becomes green it could be bacterial and you should see your physician for possible antibiotics.

Yes: See your dentist or md. Antibiotics may be prescribed if it, s bacterial but possibly can be viral and the antibiotics won't help.