My penis bends downwards too. It's nothing to be worried about. For a while I really felt self-conscious about it. But since then, I've been in two long-term sexually active relationships and neither girl had a problem with it. They commented on it because it was unusual, but it never negatively affected my sex life.
You will also notice that certain positions are easier than others. You may have to adapt your intercourse to the unique shape of your penis. You'll figure it out though. Good luck and don't worry about it.
that is life, some people have a bend or curve some don't. nothing you can do about it.