I don't think it's weird that you had those thoughts. I cook most of my meals, and when I do eat out, I always wonder about how it was prepared, how many calories there are, what every single ingredient/spice was, etc. And it's actually not a bad thing that it didn't taste as good anymore. Probably your tastes have changed, and now you're getting used to more homemade, wholesome foods. It might just mean that the next time you go out for dinner, you'll choose something different than pad thai. Something that'll taste fresher, more organic and healthy. You'll find a way to appreciate the occasional meal out, trust me. I don't think this requires more Xanax.
I just realized that everything I've written pretty much reiterates what rosiem said before me.
But for real, don't worry about it. You said the pad thai didn't taste that good to you anymore. Next time, try something you haven't tried before!