Opinion regarding anxiety and meds.

I had few panic attacks around a month back with physical symptoms like numbness in my limbs, specially left leg and arm(jelly legs), heavy-headedness, dizziness persisting. Had done a brain MRI, spine MRI and a NCV test, while consulting a neurologist and the tests have all come fine, with no indication of any physical issue. I did get my b12 checked and there was a b12 defeciency, around 130. Got the injections necessary but with no improvement ,I was told the symptoms I am experiencing may not be be due to the vitamin defeciency. Recently consulted a psychiatrist and have been diagnosed with anxiety based on the symptoms and my experience. I have been prescribed with etilaam 20 pro(morning and before sleep)and nexito 5mg(after lunch) for 3 weeks. I am just concerned about any possible side effects or withdrawal symptoms that I need to be aware of. Also would like an overall opinion.