Hi Misha29,
to the site!
Aglaonema are one of my favorite plants and I have quite a few. Can you upload a photo of your Aglaonema, showing the pot and soil? Was your plant possibly exposed to cold temperatures during transport? Does the soil appear wet, or possibly a bit dry?
Photos can often help others determine what the exact issue might be and I hope you will be able to share a photo of your plant.