Struggling with position sizing vs. 'gut feeling' on CFDs

Alright, gang, I'm a few months into actively trading CFDs, mostly on indices and a few major forex pairs like $EURUSD. I've been diligently trying to follow the 1-2% risk per trade rule, calculating my stop loss, entry, and then adjusting my contract size. It makes perfect sense on paper, right? Capital preservation and all that.

But here's my hang-up: sometimes I'll see a setup, maybe it's just really clean price action or a strong rejection from a key level, and my gut is screaming for a slightly larger position than my calculation allows. Not 'bet the farm' larger, but maybe 3% instead of 1.5%. Then I try to stick to the rule, get stopped out, and the trade goes on without me, often hitting what would have been my original target if I'd just trusted that initial read. Other times, I stick to the rule, the trade works, and I wonder if I left money on the table. It feels like I'm fighting myself. How do you guys reconcile strict risk management with those moments when you feel a higher conviction? Do you ever bend the rules slightly for high-probability setups, or is that just a slippery slope to disaster?