Weird... have you checked your liver enzymes lately? Maybe your liver values are slaughtered from previous cycles, and now you get lethargic everytime you take any orals. This has happened to many of my friends. They ran one superdrol for example, and were irresponsible...now they can't even run 20mg dbol for 2 weeks without feeling like death while others do 50-100mg for 8 weeks and feel wonderful. They believe it has something to do with the fact they messed themselves up once and now they're sensitive. I can't find the scientific evidence for this, maybe there is none. It's purely anecdotal, but I have seen this happen...like 50 times...so clearly there is some kind of correlation IMO. Also, it seems like you're somebody who always runs orals from what I have seen..
Perhaps just dropping the dose to 50mg would help, and just use other compounds that don't cause lethargy. I agree with others, 60-80mg reaps all benefits of anavar unless you are a high tier IFBB bodybuilder.