I'm thinking of having an anxiety attack tonight
I am so sorry to hear that, why do you think you might have an anxiety attack?
I'm just anxious about all the things I can't control. Thinking about my future gives me anxiety.
If you convince yourself ahead of time that you will have an anxiety attack, they you are more likely to have one. You should try to redirect your thoughts when you find yourself getting anxious. You could also see a therapist, who can help you with your anxious thoughts.
I don't want to talk to anyone about it.
Next time try to remind yourself it may not happen and try to stay calm, you may avoid an attack.