I had this same question myself the night before last as I got a killer cold and was in absolute misery. Read about it a bit online from a few different sites and they all pretty much said the same thing - big fat no due to the decongestants. Read that paracetomol was fine but really, that wasn't going to do much for the symptoms I had anyway, so I passed.
I ended up sucking on manuka honey cough drops to keep my throat moist. I also downed a few cups of honey and lemon in hot water. That and some orange juice, drinking water, and keeping bundled up, and I do feel quite a bit better today, though still crap.
Hope you feel better real soon too. It sucks major ass having a cold whilst pregnant.