could i have adhd?

I am a 24 year old male who has been diagnosed with ptsd . I am taking zoloft and buspirone which both have helped me alot with flashbacks and nightmares. however, I've noticed that I still have trouble focusing on tasks.

For example, when i study , I can only study for 30 minutes before wanting to take a break. If I want to work on a project, starting the project and sticking to it is the most difficult part for me.

my psychiatrist asked if i had struggled with grades in school. the truth is I haven't struggled too much. I managed to pass my classes, but it was hell for me because i struggled to remain focused and motivated.

now that I am an adult I don' thave that much motivation, and find it difficult to focus on school work. does it sound like adhd? or could it just be something else?