Tdap shot at 38 weeks

I was going to opt out of having the shot during pregnancy, but I got scared. There's a lot of people I've been seen not looking well. I'm the one who takes care of grocery shopping, even after the baby is born I'm not going to stop doing it (I'm kind of OCD with offers, coupons and deals since I'm on a tight budget), my husband will be at home with the baby when I go to do the shopping. I'm worried about germs, about people that is disrespectful and cough without covering their mouths. So now my arm is achy and my mind is 50% at ease. 
Anyone who waited until last moment to have the shot ? 
Did you experience any adverse effects?