My daughter and I seem to have some sort of sinus infection. She is almost 2 years old. We appear healthy with

No pain or discomfort now, its been since Christmas we have dealt with it. The doctor told me to give her Triaminic Cold/Allergy as a decongestant and I am taking a non drowsy Nasal Decongestant. Thru research I see that sinus infections usually have pain and swelling in the face and sinuses. We arent experiencing this. Seems to not bother her, and I certainly dont have pain. Just alot of Thick Green Mucus when i blow my nose. Its been a while though that We have had this..what else could it be? No fever..no pain..no swelling..seems like a common cold with no fatigue acompanied, but its been almost 2 months with this thick drainage. No cough, or upper respitory..hmm..any suggestions?