FOMO is basically a pointer that your emotions are in control of your actions. As a trader you need to have a strategy which must play out for you to take a trade and if it dosent as planned then your Stop loss will be hit and you wait for next signal. when FOMO drives your action you wont have a reason for placing a trade which is not supposed to be. just ensure you have a working strategy, have a trading book, manage your risk and be able to defend your trades in relation to your strategy.
I think FOMOs are quite common on people who are new to trading, and I think it's because of lack of experiences and knowledge. Sometimes, FOMOs can result to wins but oftentimes, decisions and actions that are driven by FOMOs usually led to a major loss. So basically, if you are a trader, your emotions should not affect your trade because that is one of the rules of being a trader.
All I can say about this is you have to stick to your strategies and plan, because this will help you to avoid making impulsive decisions. Simply, you should not be carried away by your emotions when making trading decisions and be logical and objective at all times because this would help you in the long run.