I'm not aware of any of your meds being associated with anxiety.

Sudden onset of anxiety is common and often a source of distress because it does not appear to have a clear source/etiology.

First, I'd put your question to your doc just to settle the question from a medical perspective.

Then suggest you look at this link, reading it with the question in mind: Have I begun to think along the lines outlined. It's not uncommon for "routine" worry to suddenly take on a driving force of its own, i.e., what becomes defined as anxiety, even panic attacks which come out of the blue. IF you can see your thinking patterns in this little article, you may wish to either consult a counselor and/or go to the link at the end of the article and see the catalog for useful helps.
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In any case, anti-anxiety meds can help relieve the immediate symptoms but they will not cure the problem: that requires some reworking of how you may be thinking in patterns which are disruptive.
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Interesting report:

Curr Pain Headache Rep. 2005 Apr;9(2):109-12.   
Cognitive processing in cluster headache.

Evers S.

Department of Neurology, University of Munster, Albert-Schweitzer-Str. 33, 48129 Munster, Germany. everss@uni-muenster.de.

[Edited for length.] In neuropsychologic evaluations, a reversible decline of memory processing was detected during the cluster attack, but not between two attacks. Long-term observation revealed no progressive cognitive decline in cluster headache patients over the years. With regard to personality changes, a liability susceptibility to anxiety disorders and to hypochondriasis, but not to mood changes, has been described inconsistently. All changes in alterations of cognitive processing in cluster headache are demonstrated to be mild and do not relevantly contribute to the clinical picture of this disease.

Publication Types:
Review

PMID: 15745620 [PubMed]