My temporary filling is really hurting what can i do?

It is not normal: and you want this problem resolved before you get the final restoration. If this goes away, 6-8 weeks, then tooth is recovering and getting back to normal. The transition from dull aching pain to constant, sharp and severe pain is a bad sign. There is a chance you are going to need an endodontic treatment. See your dentist for re-evaluation and treatment. Good luck.