Rlly bad anxiety attacks

I have General Anxiety Disorder and I used to take medicine for it but then decided to get off cause I wanted to try handling it for myself. And I’ve started taking it again cause lately I’ve been having rlly bad panic attacks. Where I cry and I throw up. I’m constantly insecure about my relationship where I’m worried he will leave it even I will leave him which I know I don’t want. But I keep self doubting and having rlly self destructing behavior