My 5 Year Old Child Has Had A Cold For

My 5 year old child has had a cold for the past week, had a fever of 101 for a day, (beginning of cold) and has been getting better. However, today, I picked him up from pre-school, and he had a runny nose again, and a fever that rose to 103. I gave him some tylenol, (he said he had a headache also) for fever etc. Fever went down, he vomited, and he felt ok enough to go to sleep. Should I be worried about this situation?