Re: Hi Advice please
Depending upon whether you're being treated with antibiotics for your upper respiratory infection, more specifically the type of antibiotic, then certain classes of newer antibiotics can cause palpitations, agitiation and altered sensation in some patients. It is transient and typically resolves within several days after the course of medication has been completed. Zithromax (Azithromycin) has a high rate of complaints in this area, along with some of the newer quinilones, both of which are fairly aggressive antibiotics available on the market.
If you've not previously suffered with panic disorder or intense anxiety, then my first impression would be that the event you describe was the consequence of specific antibiotic side-effects. You'll be fine.
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Best regards and Good Health