I use the Arobica twice a day (15 min. each session) followed by huff coughs to try to cough up sputum. Recently notice my throat (swallowing saliva) and even my neck feels sore--perhaps due to my trying to unsuccessfully cough up sputum (following huff cough). So I stopped using the Volara for about 12 days and noticed my neck was not sore nor was swallowing a problem. Has anyone experienced my symptoms? Barbara