Panic attacks are severe anxiety attacks. You can have bad anxiety without actually having a 'panic attack'. Anxiety frequently lasts for some time. The symptoms you mention are common symtoms of anxiety. Read many of the posts here and you'll find these symtoms mentioned in a good number of them.
Many people suffer anxiety without having actual 'panic attacks'. Their anxiety may get pretty severe at times, moreso then normal, but not necessarily so severe to be panic.
Hopefully you have sought medical advice about these symptoms you experience to rule out other ailments as the cause.
i have never had a panic attack but i suffer anxiety,and all those symptoms you have explained i have,you have not got to hyperventilate to experiance this,you said yourself you worry so that is being anxious
Thanks so much for responding. It has made me feel alot better knowing that im not really dying or something.