What to wear???

Ok ladies I have a question for you all. I am going on a business conference and I have nothing to wear. Well nothing fits me with this baby bump.... do you think it's inappropriate to wear black leggings or should I just stick to dresses. I also own 2 pairs of maternity jeans but I don't know about that either. (I honestly don't own any skirts and my slacks aren't fitting) what do I do?