Has anyone heard of a prescription called citalopram?

The name brand is celexa, it treats depression. I have been on it for 8 years and I am not able to get off if it. When I wasn't able to get any for 2 months, my anxiety became worst and I had severe panic attacks and I had to go back on it but I still suffer from panic attacks but not as bad. I am always so scared and overthinking. I get severe heat flashes and everything. I wish I never went on that drug, because it has been making my life hell. I used to get angry when I forget to take it but now I get severe panic attacks that I beg to go to the hospital because I feel like I'm dying! It truly hurts so much. I wish life would get easier