Niyati,
Don't be too bothered about the blemishes and freckles. The more you worry, the worse it looks.
Go light on fairness creams, lotions etc. It does more harm than good.
You should try Multani miiti, natural face packs(like tumeric, sandle, milk, curd with gram flour). I am sure its going to work wonders.
Most important eat well and drink plenty of water.
Rest follow Andy's suggestions.
WELCOME and take care. Most important love yourself the way you are. True beauty comes from within. None of us are perfect.
lots of love.
Rashmi