Your symptoms can be due to;
1) Atypical migraine; facial pain is common in it. Please see the resource;
2) Tension headache which appears after an heavy day of work due to tiredness and spasm of the muscles and may involve mainly the face muscles. A tension headache is a headache caused by tense muscles in the face, neck, or scalp. Sinusitis can be concomitant or aggravating condition.
3) Side effect of Lipitor which can appear any time during the treatment. Muscle pain are common side effects of it.
Over the counter medication like Ibuprofen can help. Following measures also can help;
There are dietary triggers known which should be avoided. Common triggers are
b) aged cheeses and meats,
c) wine and beer
d) citrus fruits.
See here an article about migraine variants;
For treating sinusitis naturally, which is a concomitant condition; steam inhalation, nasal saline water (salt water) irrigation (can be done by Neti-pot), Vitamin C, Eucalyptus oil inhalation can be done. Following can increase the body immunity so help;
1) Omega 3; Fish oil capsule and flaxseed oil capsule.
2) Ginkgo Biloba
3) Zinc 30 mg.
Please feel free for your follow up questions.
I would be happy to assist you further, if you need any more information.