My throat has started getting scratchy sunday when the street got smokey from a bush fire.yesturday i woke up very sore throat, started sneezing, nose started leaking, the evening my nose was clogged hot and sore throat. could it be sinus infection?

Could be: Symptoms are consistent with sinus irritation and/or infection. If you are not feverish some choose to just treat symptoms, while others prefer antibiotics. If you are in the later group, call your doc to discuss this. In the meantime, decongestants (Sudafed pe) can ease breathing, mucolytics (mucinex) will thin secretions and honey, cepastat, and throat coat tea will ease throat painGood luck