“Burst of energy” in second trimester?

FTM at 12 weeks feeling a little better but still so tired. I’ve read a lot of posts that energy comes back in the second trimester. Is this actually true? It doesn’t make sense to me because it seems like you’d only get more tired as your belly gets bigger and you’re carrying around a heavier baby over time? I’m starting a new job soon that requires me to be on my feet and I’m getting nervous I wont get that burst of energy soon