I have never been diagnosed with ADD 'officially', but I am sure if I was to get tested or what have you it wouldn't be difficult to see I have issues. I have a huge problem with concentration, a very busy mind, and have struggled with it lifelong. Even items I am super motivated for I still have trouble completing. I am a notorious person for 'incomplete' projects and promises.
The last few years, especially the last 6 months, I have been trying to tackle this from a different angle. I am essentially trying to re-wire how my 'focus' works, training my brain to learn how to stay on task.
I am using meditation, practiced awareness, and just in general trying to make this change just like I would build a physical muscle. The more I practice, the better I will get.
I also use some simple techniques like writing my task in simple bold terms on a card, and placing it in front of me at my desk. If I find myself wandering off task, the card tends to snap me out of it, and remind me what I should be doing. Now that I am more 'aware' as to when my mind wanders, I am working on overcoming procrastination and excuses that sometimes are used as escape tactics from the task for me. For me, its practice practice practice.
Another easy method that works for me is music (with headphones). Seems that when my head has something else to sort of keep it occupied on the side, I am less likely to wander all over. I tend to use pretty up beat more intense tunes to keep me pumped up and moving forward on a task. Works great for household chores, but just as well at work in a busy enviroment with people all around.
Years ago I did try meds briefly, they did not offer me any assistance, but I wasn't super gung ho about it either. I think if meds are used in combination with practice and awareness, they can be a great tool to help you overcome something like this. I personally would not use them unless they are in combination with a plan to help you move forward without them later down the road.
One thing to consider, is that any issue you have now in college, will probably carry forward with you into whatever career field you choose. So dropping out may not be the answer in this one. It may just be the challenge you needed to finally tackle focus issues once and for all
. I say this, because I dropped out of school 16 years ago......mostly because of extreme focus problems...and all those issues have repeated themselves in my career now. I have had to just deal with them in a work enviroment instead of school, lol.