Nobody wants to talk soup? 
DR Jennifer, I would recommend that you avoid cream soups of any sort. In your case this would not be because of the
kashruth, but simply because you should avoid all dairy products when troubled with a cold. Dairy products have a way of increasing the production of phlegm, which I would imagine you would want to avoid.
I myself have never been crazy about soup in general. However, when I desire soup, I usually desire soup with stuff in it, even if it's just a matzah ball or two. However, I really do not care for what in my house was called
lukshen soup, which is known as chicken noodle soup. Unless the noodles are wide, but even then I could take it or leave it. Those noodles that are like chopped spaghetti (aka sketty) are annoying, in my eyes. Campbell's, take heed!
Chicken rice soup, however, is a favorite, as far as canned soup goes.
And I never liked tomato soup much. Until the Dear Partner showed me that it is far, far better when made with milk, and with what amounts to practically an entire sleeve of saltines crushed into it, giving it the consistency of bisque. And accompanied with grilled cheese sandwich(es).
(In my childhood home, if we ever had tomato soup -- which I can't recall ever having -- it was most assuredly made with water, so as not to confuse us as to what dishes to use for dinner. Unless we were having fish, which was always a dairy meal, and with which we invariably were served canned creamed corn. I recently read the ingredients of a can of creamed corn, and there is no cream or other dairy product in it. Therefore, we now let it accompany Thanksgiving turkey -- and other meat meals -- which it always did in the Dear Partner's Roman Catholic childhood home.)
