Brew it at home if you miss it! Ive never had an issue with bagged decaf.

As for getting it out, I dont go to any of the big coffee chains. They tend not to be as careful. If I go to my local coffee places I just ask them after theyre done if they made it decaf. I explain its because caffeine can send me to the hospital. Theyve always been really good about it.

Thats my best advice.