I Think There Is Something Wrong With Me

I lack the energy to get through my day anymore. Woke up at 8am well around that time. Did my thing at work. Started losing steam around 6pm. It's now 9:35pm and I'm spent. This is shameful. I used to be able to go all night long and well into the next morning going out and having fun. These past few weeks have been awful. I've been feeling more spent and faster depleted than usual. I wonder if I'm dying.