Hello Avinash,
Buddy I am no expert in the market, from whatever little trading I have done so far one of the lessons I learnt the hard way is to trade with strict stop loss of 1 %. If we keep on seeing our stock slide hoping it will comeback or averaging it , the agony increases on every fall as many other's stop loss gets triggered and as someone rightly pointed out it automatically becomes a long term investmest.
Hope you recover your money soon, and the signs look good at this moment as US markets are rallying and are not bothered about China.
Happy Trading
Pran