Should i add xanax to my celexa regime?

Been taking 20mg celexa for a few months now and I've been doing really well. My constant worrying and depression has nearly dissapeared. However, for the past few weeks I've been having spells of desperation, hopeless feelings, and anger like a did before I started the meds. These spells make me extremely anxious and irratable and make everything going on around me hard to handle. It usually lasts for a few hours or sometimes all day. I still like the celexa and still can tell its working but I was wondering if there is anything I can take as I need it to handle my anxieties when they start in addition to that. I've heard xanax can help this type of thing I would just like to know if my doctor would agree and if anyone has a similar experience and thinks it may be a good or bad idea. Or if there are any recomendations for a different medication besides xanax? Thanks