Flu shot?

Vivian

So my LO got the flu shot on Jan 3rd & around the second to third day he got really sick. Coughing, fever, runny nose; having a hard time sleeping cause he couldn’t breath well. It was so heartbreaking going through those sleep less nights watching him go through that 💔

Dr mentioned that I will need to bring him back to get a second dosage, I’m just scared that he will get sick again. Any mommy’s experience anything similar? Does he really need to go back for a second flu shot?