Thanks for writing to H.C.M. for your query.
I have gone through your query regarding feeling of strain while talking nd you does feel tiredness
Considering your symptoms it appears most likely you are suffering from VOCAL CORD THCKENING. and to treat it you should do-
(a) Take DECONGESTANT and MUCOLYTIC
(b) Don't speak loudly and try to be silent.
(c) Steam inhalation.
(d) Speach therapy.
I hope this will help you.