What Causes Hands And Toes Coldness, Numbness, Tremor, Tiredness, Stress And Anxiety?

hello im 18 years old male,174cm ,68kilos and I really get stressed some times, thinking of having high bp and that it will really make me sick.. I sometime take my bp and its not more than 148over 98 when Im really anxious about it...I mean Im really anxious with it... I can, all of the sudden, feel tired and numb but i do believe that this is caused due to my anxiety. That happens when Im outside and Im alone as well. While taking my bp I try several times to make sure that everythings fine. But while doing that I only feel more sick...All the symptoms that Im facing are: numbness, feeling cold and my hands and toes (most of the time my hands are cold),trembling, tiredness, and feel like im not breathing right. Im not expiriancing any pains though.