I wouldn't muddle those too much (SAT with IQ,) there is definitely a ceiling on how much fluid intelligence is being measured versus the less ceilinged crystallized intelligence.
To the OP: gifted is just a concept, it isn't a switch or a magic category. People who are labeled gifted range all over the place in terms of how close to norm they are. But curiousity and a passion to learn are hallmarks of intelligence along with the full range of details. You are a more complex and interesting person than a simple six letter word.
However, depression, anxiety, OCD are not just labels they tend to represent real brain chemical imbalances and aren't your fault, and they don't point directly to specific causal life experiences. They are also things that can be somewhat managed with medicine.
If you want a quick (and fun) thumbnail on the fluid side of intelligence, try the Ravens Matrices online:
http://www.raventest.net/ Don't worry about results, have fun; there are hundreds of IQ tests online, take them all and analyze them to figure out what they tell you about your mind. Slip in a cognitive psychology course as an elective.
