When did your insulin resistance start, 2nd Tri?

I’m almost 24w right now and still no significant resistance. I’ve increased my basal and carb ratios slightly the past month or so, but I haven’t had any sudden overnight resistance like I was anticipating. I’ve even had to decrease my ratios here and there as I’ll start running lower randomly sometimes. Has anyone had a similar situation, with no sudden/drastic resistance? Or maybe even no resistance at all?