If i quit the pill now will I get pregnant ?

On birth control, it’s horrible. Making me suicidal and just super depressed. I need to quit it as soon as possible. I had sex on saturday with a guy, he pulled out. And i’m about in the middle of the pack. Should i just quit this coming saturday since it’ll be a week after sex so i’m protected? Or should I wait til i finish my pack in like 2 weeks? I just don’t know how much longer I can stand being on it when I feel suicidal....