Do people with ADHD commonly go through this?

Hey guys! Do you all find it difficult to stay energized especially during the day? I’m currently on modafinil and it’s safe to say that without it, I can hardly function in the daytime.

Also, does anyone else go through the following -

• Drowsiness after periods of intense focus
• Difficulty understanding or forming complex sentences
• Living in oblivion especially with regard to things that are “common knowledge”
• Understanding abstract concepts but lacking the ability to express them verbally
• Hyperfocusing on new interests and then forgetting almost everything you learned later on

Any insights would be super helpful!

Edit: Could these symptoms be a sign of ASD or does this sound more like ADHD?