Struggling with the math section timing

I keep hitting a wall during the last fifteen minutes of the math section. I can solve the individual problems easily if I have time, but the second the clock starts ticking, I feel like I'm panicking. I usually breeze through the first half, but once the questions get into more complex geometry or trigonometry, I start overthinking the simple stuff and lose momentum. It feels like I'm constantly rushing through the easy questions just to save time for the hard ones, which leads to silly mistakes. Has anyone found a specific strategy for pacing? Should I just skip the hard ones immediately or try to grind through them? I need to fix this before my test next month.