Be careful about explaining that your illness leads to problems with studies, when applying to colleges that expect a stong performance. It’s not all about taking a harder load, but how you actually do in those classes. In many cases, picking the right matches can serve bwtter than reachy schools.
And your GC should be advbising you on the ECs, balance, and the right targets. USC and UCB will be tough with the grades, you haven’t mentioned scores. RISD will need a strong show of your art talent.
Be sure you ca afford these, check the NPCs. BU and NYU are known for not offering great aid to all.