First, and most importantly, we're not doctors here - we're a peer support group.

That said, IMO, yes, you should go and see a doctor. A headache persisting for that long could be an indication of something more serious, and there is not enough information here to even make a wild guess. A doctor will take/know your medical history, examine you, and possibly order some tests for evaluation.

Google: headache when to see a doctor

Doc

I agree, for a long lasting headache like that a drs visit is a good idea.

If you were really drinking a lot of alcohol every day , then that could be a factor , like withdrawals.. I don't know if that applies in your case or not.

Or if it mainly happens while at work , maybe it is due to sick building syndrome..

Although migraines can have a low fever, they typically do not produce higher fevers so a physician evaluation is warranted for this alone, let alone the duration. Prolonged migraines (>72 hours) can happen and are often tackled in different ways then just treating a "routine" migraine. Withdrawal from alcohol can certainly be a trigger. If bad headache and fever, think infectious causes, even Rocky Moutain Spotted Fever among others.

If your doc can rule those out, then they can hopefully knock out the headache. Consider simple, natural preventive options for the short term- from supplements to lifestyle changes (relaxation, biofeedback, hydration, reduced caffeine, etc)