Mild problems following DTaP vaccination can include:
Reactions where the healthcare professional gave the shot
Redness
Swelling
Soreness or tenderness
Fever
Fussiness (irritability)
Feeling tired
Loss of appetite
Vomiting
Reactions where the healthcare professional gave the shot and fever occur more often after the fourth and fifth doses of the DTaP series than after earlier doses. Sometimes the entire arm or leg that the shot was given in swells after the fourth or fifth dose. If this happens, the swelling lasts between 1 and 7 days.
Mild problems following Tdap vaccination can include:
Reactions where the healthcare professional gave the shot
Pain
Redness
Swelling
Fever
Headache
Feeling tired
Nausea, vomiting, diarrhea, or stomach ache
Chills
Body aches or sore joints
Rash, swollen glands
I feel like that your symptoms are mild reaction to the vaccine. If it persists, contact a doctor. However, I guess the advice the doc will give you is still "wait and observe".