Yes. For about 10-15 years I felt constantly tired. The mental fog and inability to focus on much on most days was the worst. I was then diagnosed with sleep apnea, and then ADHD, and then autism. I have a dental appliance that helps with the sleep apnea and now am on ADHD medication which has helped tremendously. Knowing I have a very limited "social budget" has helped as well. But now I'm getting tired for another reason, which is more related to being burnt out and probably anxiety. Definitely talk to a doctor but you need to be assertive. I made the mistake for years of only casually mentioning major issues in my life during an annual physical, for example by saying "yeah I feel low energy a lot" or that I "sometimes have trouble focusing on work". Then the doctor wouldn't really say much about this. I wish I had used terms like "I feel chronically fatigued" and said "I am looking to be tested for likely causes". Or I should have made an appointment to specifically talk about those specific concerns. A psychiatrist might also be a good person to talk to in addition to a medical doctor. Seriously once I got over my hesitance to be assertive about talking about this stuff with medical professionals, things have changed positively quite a bit.