hopeful

So my boyfriend, of 4 years, and I had a romantic night last night. When it came down to withdrawal we did not. No protection, and no withdrawal. It was the last day of my women week and idk if that means anything. My week was shorter than it normally is, it was from Sunday to Wednesday which is weird cuz it's normal from Sunday to Sunday (a week). Could I be pregnant? We never use anything and he withdraws but you can still get pregnant even with withdrawal. I'm hopeful but realistic. Someone please talk to me about it.