I took it occasionally, it is one of the worst drugs you can take for anxiety. Don't medicate anxiety. Look up allostasis, you are changing your mind's chemistry to rely on this substance to fill in a gap that your mind normally would have did a half-assed job doing. When you don't have this substance, you will experience worse anxiety and this won't be some long off future with phenibut. It will be very soon, most people recommend taking a dose and waiting a week. Benzo withdrawals are hell.
Try eating more zinc/B6 into your diet, if you're deficient, supplementing. It helps GABA production, which is the main thing benzos target, it's responsible for making you feel relaxed. Having a nice cup of white tea helps the natural production of GABA. Avoid benzos, you will regret it. If you've just started and are taking phenibut more then once a week, stop. See how you feel. That's just a baby taste of what's to come.