ADHD, is it just a way for drug cos. to get rich?

When my sister was a child she was diagnosed with ADD and put on meds for about a year or so while she was in school. One of her teachers stated that they wanted to work with her without the meds and so she was taken off the meds and I don't think ever put back on the meds. She had issues with focus and concentration but she was smart she was actively listening to what was going on in class even when she didn't seem to be paying attention/ or being disruptive to others around her in class. I often wonder how things might have worked out for her if she had been kept on meds all through school. I wonder if she might have actually stayed in school more often and made an effort to actually work on things in class and stay more focused on the goal of advancing to the next grade. One year my sister essentially tested out of summer school after failing a grade for failure to show up to school.

I'm addressing this because of a few things I discussed with my psychologist about myself and my inability to focus or complete assignments in a timely fashion. I've been back in school for almost nine months now and my lack of time management and the ability to complete major assignments on time has just been getting worse and worse. Being a SAHM and online college student has been really rough on me the last couple of terms because of the major writing assignments and my seeming inability to get them completed on time. I get distracted very easily. Can't focus or concentrate and tune out the background noises of daily life in the home. I also am generally quite tired by the time I put my son to bed at night so I'm not able to stay up several hours at night to get work done. Often times I'll sit down to start working on things for school and I get distracted by something else that needs to get done such as laundry, or dishes or a trip to the store for something. I am constantly procrastinating. Even with this current term I'm retaking a class that I dropped out of last term and thought I was ahead of the game as far as getting research together and getting through the reading. No such luck. Now I'm not just one week but two weeks behind on my first project and I need to have my next project almost complete by this time next weekend. Talk about a goof off. Maybe once I see the psychiatrist and figure out if I could possiblly have ADHD and maybe go through some therapy and maybe get some meds in order to keep it under control then I'll be able to get myself organized and put together better.