First, accept the loss. It does not make you a loser. No one can make money in every trade. Losses are a part and parcel of trading.
Second, analyse the process. Understand your basis for the transactions executed. Did you have a plan? Did you follow the plan? Change the plan only based on an analysis of all transactions for at least a month, and not based on a single transaction.
Finally, assimilate the learning. Identify a clear next step. if you did not have a ...

Investing is buying a part of the company.
Trading anyhow is gambling.

1. Focus SG holdings as dividend portfolio (60%)
2. Focus US/HK holdings as growth portfolio (10%)
3. Refine Short-term trading with Options strategy in US market  (30%)
4. Rebalance item 2 to 30% and item 3 to 10%, if  market crashes
5. No short-term trades without stop loss or options hedging

1. Flip-flop about whether I am holding stock for long-term or short-term depending on price movement
2. Not cutting losses
3. No plan