My maltese keeps swallowing hard and choking, whats wrong?

I've been trying to find a food she really likes and i bought "by nature" wet food and i mix it in with science diet dry food the natural one. So about a week ago i realized her ear smelled bad.... she had an ear infection, a few months ago she had one on her other ear so i used the same medication for it and it seems to be getting better. Tonight i realized shes swallowing more frequent than usual and it almost seems like shes having trouble. She also seems to be choking or coughing? Her vet is closed so I want to know what I can do in the mean time to help?

Thank you so much.
 
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