If you have to go around lying and hiding something from your spouse, then there's an issue. And it isn't with you.

Sure, you were worrying without any evidence - that can in fact show anxiety. The fact that you happened to be right does confuse things... but your anxiety was there without any actual "proof".

Now you've got proof though... and I wouldn't be surprised if your anxiety increased, because now you know that you've been lied to and that he was more alright with you taking medication than being honest with you!