I've just left my partner, I don't know what to do?

I've posted previously about how my partner was making me feel, so I've decided to leave him, problem is though. I don't have anywhere to stay, I can't afford a private rented house, and I'm currently in process of getting a mortgage. If I was to leave id have no money for furniture, carpets or anything. I'm kinda freaking out, we are keeping the separation on the down low the now till I sort things out but I don't know where to start😭