If i spit cum out and put it in my vagina will i get pregnant?

You can indeed: I hope this is what you want, and what he wants as well. Now please forgive my frankness -- i believe i know what you are considering. This is a way that's been used to entrap a man into becoming a father without his expecting anything of the sort. If you resort to this, you will ruin three lives. Please reconsider. You deserve much better from life than where this will lead.