I am taking Celexa 20 mg for anxiety and panic attacks. From 2011 to March I was taking first 20 mg and then 10 mg and was fine> I went off it in March 2015 and anxiety came back this Fall. I started again with Celexa and panic attacks disappeared again. However, I going through a very stressful period now and feel anxious again, although without panic attacks. Should I increase the dosage to 30 mg? I was taking 30 mg for a period of time in late 2011 and early 2012. Secodn question is - whether a mild sense of de-realization and "strangeness" that I have in te ast few days signifies worsening of my condition, or it could be temporary phenomenon?