7-8 weeks ago I had a heavy cold virus, after 2 weeks this turned to a sinus infection - very painful headache (couldn t tilt my head forward) and thick foul smelling and tasting yellow mucus from my nose. I saw my doctor and was prescribed doxycycline 100mg for 7 days (200mg first dose). This cleared the mucus but the headache persisted until the day after the antibiotics finished. However my nose and face sinuses still felt congested and hard to breathe through both nostrils and at night I could feel my sinuses slurping and moving when I turned in bed. This continued for 4 weeks and then in the fifth week I started to feel unwell again and started getting thick yellow/brown mucus down the back of my nose and into my mouth. I revisted the doctors and got another round of doxycycline 100mg for 10 days this time plus some steroid nose drops. It has been 3 days now but I have seen no improvement. Is this the usual course of treatment? I m just worried this will keep happening and I will have to take antibiotics every month. I am allergic to amoxicillin. I use a saline nasal rinse and inhale steam and use oral decongestants - nothing lets me breathe freely through my nostrils. I am female, 35 years, 5ft5 and 8&1/2 stone.