Anxiety help........?

recently i've been feeling different and strange things happening and somebody suggested i may have an anxietydisorder. before i go to the gp i want to check my symptoms are real and not something else.... i get nervous all the time, especially when meeting people and try to avoid it as much as possible. i get butterflies all the time and when put in the spotlight i get really embarassed and go out of my way to avoid this from happening. also, sometimes i will be on the bus or even just in bed and i feel as if i cant breathe and im trapped and have to get out, this can be distressing especially on a bus full of people. ive also become very jumpy and on edge all the time and loose my patience, even close friends have relised that i am not myself anymore. should i be concerned?