bump on arm after whooping cough vaccine?

i had my whooping cough vaccine and another one that i cant remember the name of on tuesday. the lady said it was going to feel stiff and sore and that i might get a fever.now i feel a bump on my arm.if i rub it i can feel a big bump inside.if i put my hand on the part where the bump is it feels warm.is that normal? ive never had a whooping cough vaccine before so i would have no clue if its something serious or not.
 
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