Hmm, I haven't kept close track of my experience of colds (I'll try to do that next time I get one, assuming I still remember), but I've noticed that I seem to experience symptoms consecutively -- a day of nothing but sore throat, then a day of nothing but sneezing, then a day of nothing but runny nose, then a day of nothing but a headache. And then a cough that lasts for months even after every symptom is gone.

No depression, though. The main negative emotion about colds I get is "irritated that my body is doing this shit".