I have a sinus infection . It's been going on
Go to family physician or ER.
Hello dear, welcome to Ask a doctor service.
I read your query and here is my advice.
I think you can help yourself with symptoms using any antinflammatory drugs such advil for pain. Also you can use antihistamines such citerizine to help with secretions. This are found otc
Antibiotics are sold only with prescription.
You should go to your family physician for a prescription or you can go to ER otherwise you can't get them.
Hope I have answered the question
Let me know if I can assist you further.