no weight gain?

S
Hey all! I'm 15 weeks, and have yet to gain a single pound!! I'm actually a lower weight than before conception:( 5'6" 114 lbs. I have a doctor appt. next week where I plan on asking her if this is normal or not, but was hoping some of you other mamas could give me some feedback! How do I know baby is getting everything he needs?? Help!!