People on here are constantly asking "Is this normal". Here is a list of normal anxiety symptoms..

Pins and needles,
Muscle spasms,
Difficulties breathing and/or chest pains,
Difficulties swallowing,
Upset stomach,
Diarrhea,
Nausea and possible vomiting,
Light headedness,
Headache,
Blurry/blue/pinhole vision,
Back pain and other random pains are also possible,
Physical weakness, and 
Dizziness


All of the above are very common and medically recognized symptoms of anxiety and/or panic attacks. There are numerous reasons why these physical and psychological symptoms occur and they are all complicated. Ultimately the mind is very powerful and can subconsciously controll many aspects of your psychological body and it all happens without your conscious decisions. Googleing the information you do not yet have and absorbing it can actually be a good way to help take your focus off your symptoms. When it comes to anxiety, information is often power.