Is your CBT therapist a psychologist? You might discuss this with your therapist. Also, if you just started CBT, you can't expect it to have solved all your problems already. When you're in therapy, it can get worse before it gets better, and with CBT because you're directly facing what you're anxious about it always takes time and a positive attitude before it works. You're young and at a time of rapid change, so it's not easy for anyone; I'd have a chat with your psychologist about your thoughts.
u say have had these thoughts for over a month, do u remember if anything happened to u that may have been traumatic that would trigger these thoughts? also, have u made an apt with a therapist, or even speak to your school nurse and maybe she can point u in a helpful direction. Please know that u are not alone, I have these thoughts- and was put on medication that has been very helpful, the dr said I have an anxiety disorder and its very natural for the mind to spin out of control when u are in that red alert state= which u are, and we need to get u out of that, suicide is not the answer, and trust me, Ive thought of it, but then I think of Robin Williams, and if I were his friend I would have helped him, so shouldn't I help myself? I also advise writing everything that happens in your day at the end of the day in a notebook, it is a form of therapy- u get it out, and it helps your nerves. please keep me posted, Im 32 yr old woman, and Ive been in your shoes at 14- and it was much worse at 14- so I have an idea of how u feel, and I promise u it will get better.
I deal with this too. Similar thoughts. You are not alone. In fact, I'm here today because I drank a bunch of caffeine and the thoughts and panic ppopped up. Do you drink caffeine? Eat a lot of sugar? Take any recreational drugs or drink alcohol (I know you're young, but I always ask)? These things can contribute to the anxiety. It took me more than 3 sessions of CBT for it to work. Do you see a psychiatrist? They can give you a proper diagnosis.