Struggling to invest monthly into World ETF at all-time high+ geopolitical risk… am I overthinking this?

Basically what the title says. I’ve been investing monthly into a World ETF, but right now it’s at all-time highs and with everything going on in the Middle East, I find it hard to keep putting money in. I know you’re not supposed to time the market, but psychologically it feels wrong to buy at these levels when a drop feels more than plausible. Hence, I ended up pausing my investments for the last 2 months because of this. Am I just falling into a classic bias here? Or is it somewhat reasonable