You can still get Dimetapp infant drops for the symptoms you have mentioned but you need a prescription. You used to be able to get it over the counter but in the US there were a lot of infant deaths which were attributed to it because of incorrect administration, so there has been a blanket ban on selling it OTC.

Other than that there is not much you can do

You could bring her to bed with you until she gets better. I remember doing that when Flynn was sick around that age.

I hope she gets better soon for both of your sakes.