Hello Welcome i H.C.M. I have gone through your query regarding recurrent throat problem, as you said that you are also having sinus issue, so I would like to tell you that sinusitis is one of the important cause of chronic throat infection. Actually because of sinusitis there always remaines post nasal drip and this carries infection to throat from time to time. Therefore My suggession is you should consult any ENT doctor for thorough examination and relevent investigations to work out the real extent of pathology. In this way complete diagnosis may be made and further treatment may be planed. Regards.