Flu Shots at Pharmacy?

• ♡ Mom of girls

I wanted to make my daughter an appointment with her pedi to get her flu shot, but they cant get her in for another 3 weeks. The only other places around I can find are drug stores..CVS/Walgreens. Shes 3.5..i have no clue why im nervous about taking her there for one..but i am. Has anyone used a drug store for their kids flu shot?