I think that it is possible. There are a lot of times that I don't feel anxious or stressed, but still get annoying symptoms. Our bodies work in ways that we don't understand and just because we do not think we are anxious our subconsious minds are thinking anxious thoughts and producing symptoms.

One of the things that anxiety does to the body is put it in action-so some parts of the body will react to a physical change using the same process that comes on through anxiety.
Learning the difference between a physical reaction to anxiety and that to a different event takes practice, patience, and time.
I had to keep a journal to help me sort through the symptoms, since I didn't want to be on any more medication for any longer than I absolutely have to.
Hope this helps.

This is what really gets me. I hardly every feel mentally anxious first, it's usually the physical symptoms that come out of the blue and trigger anxious thoughts.

I agree, I think at first my anxiety was caused by stress and racing thoughts.

But I think now it's caused by the physical symptoms. But I also think I attribute more thought and worry to physical symptoms that previous to my anxiety attack I wouldn't have thought twice about.

Now if I get indigestion I'm fighting with myself if it's indigestion, a heart attack, or anxiety. Therefore creating panic. And simply put, it's the fear of the next attack. I have gotten better with rationalizing with myself and it does help. Positive self talk helps me quite a bit.

There is a mind body cycle that goes on wwith anxiety. Imagine that you are in a store and you are all excited and you turned your head too fast and things looked blurry. You tell yourself oh no my vision is blurry, then you start getting sweaty, which then your mind thinks whats going on here, and then your heart races, etc, etc. The cycle has begun. Now you planted a seed. You go to the store again, its warm - you mind remembers that the last time you were in the store you were sweaty,. You mind does not know what the body sensation means until you tell it and you either tell it it is just hot in here OR you tell it OMG I am sweaty! Then the anxiety cycle begins. Now your mind associates anxiety to stores and unless you break that pattern, you will end up not going to stores.

It is hard and scary but not impossible to get over this. Just know