Baby names

I am 15 weeks. We have dreamed of having another child for years. Went through every fertility treatment there was. And finally after scheduling my hysterectomy we find out we're  pregnant. However as long as we have dreamed about having another child, we still have no names picked out yet!!!! We know the middle name is going to be Jay, after my dad who passed just before Christmas. But no clue on first names. We like Piper or Sadie for a girl. But we really can't settle on a name for either gender. HELP!!!!!