FOMO happens to me when there is a lack of certainty, meaning that I am thinking about several things and I am not sure of the decision I made, or when I do not develop a specific strategy, and both things can be solved easily, as I can place a bot to trade with a strategy, and after that, if a loss occurs, I will not regret it, but as long as I prepare. Thinking about your investment or if you do not have a strategy and plan, FOMO will control your investment decisions, and then you will depend on luck for the success or failure of the plan.
It's okay to FOMO that way but the FOMO that the OP is talkin about seems not right, and there must be a major reason for it to happen. It is still better to stick on our promise even if what we get in the end is a loss. If not, and we are right with out decisions, we can gain a lot of benefits.
Even if we use a bot, I think it is still possible for us to get involved in a FOMO, unless if we already ran the bot before, and we haven't go back yet in the market nor watch a news because that can trigger us to FOMO. Thinking about our investment is fine because what if we forgot them? What is only wrong is when you over think them. We need to distract our selves in other things in order to avoid it.