If they aren't receptive to you asking for medication, avoid mentioning medication and talking about how hard it is to focus and how distracted you get, giving examples if you're prompted to, and also if you aren't.
Also make sure they are a psychiatrist. psychologists aren't MDs. They can't prescribe and usually don't try to refer you to someone who can, they'll just work on your issues. A psychiatrist is an MD and thus can prescribe. And they have the stereotype of loving to prescribe. It's a stereotype, so that's not exactly true, but at the same time it is. They know what medications can help what issues, and can prescribe them, so yeah they do like to prescribe, not because they are pill happy but because it can and often does help. Some of them are pill happy...
Hugs. I hope things will get better for you between your mom and you. I honestly do.