MacBook Pro M3 Heating up

My Mac was running flawlessly, (new Mac user here). Recently did the update to Sequoia 15.7.1

Since the update, If I am plugged in or plug in my external drive, it heats up to a concerning level. Once I unplug, it cools back down. When I first updated a couple days ago it seems a little laggy but not bad now. Anyone have this issue and found a solution? Is this a bug in the update? Is there a way to revert back to the previous OS? I'm still learning here after a lifetime of windows so please be gentle with me. Things like this make me never want to update. Any advice out there?