Tetanus injection and blood at site

i had a tetanus injection 2 days ago. when the needle was pulled out, there was a lot of blood that came out. this has never happened to me for any injection ever. now 2 days later , my arm is stil paining and the pain is in my shoulder, neck and left chest. should i do something about it. i am really worried and have not been able to sleep for 2 nights thinking the technician has injected my vein for so so much blood to come out. what should i do.