I’ve never felt worse

Been on 60mg of Prozac for a few years now? Used it for OCD , depression , GAD, and PTSD. Recently it hasn’t been working and ive been incredibly depressed. I was diagnosed with seasonal affective disorder and was told to take 150mg along with my prozac

Maybe about a week in now, I have never felt worse. I am geniunely freaking and crashing out. I am in a panic episode and about to delete everything about me online leave everything behind. The only thing on my mind is suicide (im not going to do it, it’s just there). I just need someone to tell me it gets better. If someone has been in my shoes. I don’t know how much longer I can deal with these thoughts. I’ve never been so paranoid in my life and im so scared. How long does this take till I start to feel okay? Or is this my new normal