I got a tdap vaccine yesterday and now i am sick like a cold? related or coincidence?

Coincidence: Tdap sometimes causes physical symptoms other than arm soreness, but not cold symptoms. For info about vaccines and their side effects go to cdc web site: http://www.Cdc.Gov/vaccines/vac-gen/side-effects.Htm#td.

Vaccine reaction: Your getting a cold may just be coincidental. Side effects from tdap are usually fever, body aches and pains, malaise (not feeling well), feeling of tiredness, pain on injection site , etc but not nasal conestion, runny nose, sneezing or cough.