You have to actively ignore the side effects of anxiety I.e your feeling of unreality, you don't 'have to' ignore because it will go away as soon as your anxiety has lowered from it's peak so don't feel that if you don't then you are doomed, it just quickens the process of lowering your anxiety if these feeling/thoughts are not on your mind, it's a vicious circle, 3 weeks ago I was 'stuck' in it myself, it's utter rubbish, it's nothing other than a trick that mind is playing on you, don't give it the time of day, I kept myself busy, I didn't stop doing what I wanted to do, I didn't stay indoors and dwell on it, I even bought a little greenhouse and started growing vegetables, Jesus, me growing vegetables!! Ha ha, anything to take you from that place man, even if it's for moments at a time it's still worth it, I saw it like a trick, think to yourself that your not going mad and your anxiety will drop to that certain point that it has to and before you no it you won't be thinking like that anymore you will be back to normal,trust me ive been in that world shit and although I don't envy you, I know you'll be fine and you will even laugh at your thoughts after I tell you!!!! Stay cool man