caught a cold

Our daughter caught her first cold this month. The photo was taken April 7th. She woke up that day with a very snuffly nose. By today the nose is a lot better, but she was spitting up all weekend - I presume from the drainage. She's been in good spirits almost the whole time, and hasn't had a fever. I read that the only way to tell the difference between a cold and allergies is how long it lasts. If symptoms last longer than 1 month, suspect allergies. You treat them the same way anyway.