Let's take a minute to talk about your medication.

This is cephalexin suspension, and you should shake the bottle well before each dose.  Also, to get correct doses, you should use a measuring spoon, or an oral syringe.  

This antibiotic treats infections caused by bacteria, but it can't treat viral infections, like the common cold.
People usually tolerate it well and start feeling better soon.  But, finish the full course, or the infection could return and become hard to treat.   

Some people may get an upset stomach, and taking it with meals should help.  Also, diarrhea can occur, and your pharmacist can advise you how to lessen this.  But, if diarrhea is severe, or lasts more than 2 days, let the doctor know, even if it happens weeks from now.

Also, tell your doctor or pharmacist if you notice a rash, because it could be related to this medicine.

For best results, don't skip doses, and try to get plenty of rest.