Thank you for writing to JustAnswer Health with your question and sorry for the delay, i had your answer written all the way out one time, but lost it due to a problem with the web page.
If you have not tried a "neti pot" to rinse your sinuses, this may be the solution to your problem. Although in Western medicine doctors have recommended using a bulb syringe with saline solution to rinse out the nose, they are also beginning to recommend the use of a neti pot, which originally developed from Eastern Indian medicine, or Ayruvedic medicine. The main difference is that the neti pot is shaped to facilitate the fluid solution running up through the upper sinuses and out the other nostril. The saline takes excess and old mucus along with allergens (like pet dander and pollen) bacteria, fungus etc. This helps the inflammation decrease as well. It is actually not painful if you use the correct saline solution mix. The solution may not go all the way through the sinuses and out the other nostril at first, but if you use it as far as it will easily go, after a few days it will clean out enough mucus to go all the way through. The results can be quite dramatic and relieving.
It will also be important that you keep your pets off your pillows, keep them bathed as much as possible, out of the house as much as possible, or at least keep certain rooms pet free. Wash your linens frequently, and wash your hair and clothes frequently to remove allergens and pet dander. Using a hepa air filter can also help.
For additional helpful information please see these links:
Information on neti pot (sinus rinse)you can buy these in drug stores too: http://www.gaiam.com/product/id/1007372.do
Air Filters: http://life.gaiam.com/gaiam/p/Breathe-Easier-in-Your-Home-Air-Filter-Guide-8-Simple-Steps.html
sinus remedies: http://life.gaiam.com/gaiam/p/NaturalRemediesforSinusitis.html
Additionally the muscle tension is likely related to the inflammed sinuses in part, but also tension and stress. I can give you links to relaxation exercises that may help you , although getting your sinuses clear should help too.
If you have questions or comments please reply to this post so that I can respond to you until you have the answer that you need.