its been practically 3 weeks since my cold after a visit to italy, but even now i can't seem to regain my high notes (the C thats 2 octaves higher than middle C) my highest comfortable note is now crrently the C thats one octave higher than middle C...

i can't hit the high notes i used to be able to hit.. does anyone suggest any way i can help?
and i also to ask to make sure- do lemons actually make your voice go higher? or does it just help recovers your voice, coz im a soprano 2, and sometimes i cant hit those higer notes..

I`d really appreciated any advice. thanks