If you unwrap the hype surrounding "new market high" or "all time high", it's not as exciting as it sounds. Over time, stocks go up. They should frequently hit new market highs, because over time the trend is upward.
With an emergency fund in a savings account, you'll experience the same thing. Even at 1% interest, your savings account is always hitting an "all time high". It's just earning 1%, but each month when interest is posted it's higher than the last.
A separate problem is that people can't predict corrections and problems in the stock market before the fact. So if you think we are due for a correction, you are probably wrong. You might be correct in saying we'll get a correction, but you can't pin down the timing, which isn't useful for investing. So most of the emotional fears you have about the market swings aren't things your emotions can help you predict. It's not a lion in the jungle about to strike - where the silence might make you nervous since every other animal has fled. Instead, it's all the businesses in the world being traded on active markets in unimaginable volumes of currency, and can't be predicted. So settle in and enjoy the long term.
It may be a good time to check that your percentages fit your time horizon, though. Take a look at a target retirement fund (maybe 2030?) and check that your portfolio matches the bond and stock percentages - or is somewhere close. If you have 5% bonds and the fund has 20% bonds, that's something to look into.