Shalini - keep on singing, wherever you are. Over the past five years I've managed to extend my vocal range simply by singing, to myself, songs that were outside my range. The vocal cords are muscles and exercise can make a lot of difference. Just don't strain too much, but nibble away at the edges of your range and you will see a difference over time.

Five years ago 'John O' Dreams' was way outside what I could sing and not see the pained faces of listeners. I found the Les Barker parody 'Custard Creams', which is funny enough that people will laughed even if I didn't quite reach all the notes. Repeated singing of that brought me to the realisation, one day, that I could hit all the notes well enough to sing the original.