2nd trimester exhaustion

I'm in my second trimester with my first. I'm 20 weeks and 5 days. Everyone says that I'll have some burst of energy during this time. The energy lasted for maybe a week, my first week not being nauseated. That was around 14 to 15 weeks I think? But now I'm exhausted all the time. I lay down to sleep and I just feel restless. I feel like I'm not getting enough sleep, which I guess my body is just prepping for after birth🙄 does anyone else feel like this?