Ritalin is typically more anxiogenic than Adderall, which in turn is more anxiogenic than Dexedrine. All of them can cause anxiety however (severe in some people), and your goal should be to find a drug and dose that allows you to concentrate and focus productively without causing you unease or panic and making you channel your mental energy into the sources of anxiety. IMHO, the only way you can really find that out is to try out whatever your doctor gives you, and decide what to do next according to how it affects you.
Personally I could never get on at all with any of them, but you may have more luck.