Write an article based on this summary:

Recognize anaphylactic shock. Use your epinephrine injector if you carry one. Go to the doctor, even after injecting yourself.

Article:
This can quickly become fatal and may occur within minutes of your exposure. Symptoms include:  Hives Itching Flushed or pale skin The feeling that your throat is closing Swollen tongue or throat Breathing problems or wheezing Weak, fast pulse Vomiting Diarrhea Fainting If you carry an epinephrine injector (EpiPen), give yourself the injection. Follow the instructions in the package.  Inject the medication into the outside of your thigh. Do not inject it elsewhere because this will increase your chances of having side effects. Do not use the medication if it has changed color or if you see solid clumps in it. Because anaphylaxis can quickly be fatal, go to the emergency room even if you feel better.  Getting checked by a doctor is necessary in case the symptoms start again. Side effects from the epinephrine injection can include skin reactions, fainting, irregular or racing heartbeat, vomiting, stroke, and breathing problems.