If you harvest any weed that has many white pistils left you will get an up motivational high which does not cause anxiety because funnily enough its an up high,it wouldn't matter whether it was a sativa or an indica.
If you suffer from real anxiety attacks why would you want a debilitating couch lock that would only add to your anxiety because you are rendered incapable of defending yourself or fleeing the scene.
Sounds to me like your just plain old paranoid and you dont like the trip from a sativa