I have a very sore chest, not congested but get a very slight cough here and there, it's been over 3 weeks now, took antibiotics for infection, no change, my asthma medication not helping, what could it be?

Chest wall pain?: Is limited the information that you provide and there are multiple reasons for a sore chest and the possible causes may varied depending of the location of the discomfort on the chest. A common cause is a costochondritis, which usually hurts in the anterior chest wall. Moist heat, posture-mechanics and anti-inflammatory medications could help. See your Primary Care for other causes.