Loss of appetite

I take ritalin and for anyone else who has the problem of your meds making you not feel hungry at all - what do you do?? I’m kind of recently diagnosed/not used to this feeling and I find myself not hungry/feeling nauseas at the thought of food so I haven’t really been eating [enough] (i know that’s bad that’s why i’m asking for health). I’m also an athletes who has practice everyday after school which makes it tougher when I’m malnourished. It’s not that I like starving myself I just can’t even think about food or have an appetite to eat. Pls help