I Am Currently Being Treated As If I Had A

I am currently being treated as if I had a sinus infection with a dose of 20 mg, two tablets daily for five days, one tablet daily for five more days. Also a two week regimen of doxycycline, 100 mg twice daily for two weeks. I am in day five of treatment. Sinus discomfort in eye sockets and teeth has been reduced as well as a return to better energy levels. I am still having significant swelling of two veins on either side of neck that seems linked with continued feeling of pressure related to my eyes. Is that related to the sinus infection or are these two different issues?