My father owns a travel agency.
If youe traveling with your husband you do not want the emergency seat for the arms do not go up and the seats do not go back. If your not real tall the regular seats are fine. If you take the carseat on the plane you will have to pay for a seat unless there is an empty one next to you.
Children under two do not have to have a seat so you do not have to pay for them. When you book the flight let them know you are traveling with a infant.
If you are planning on taking the carseat on the plane (for sure) you have to pay for a seat. You really don't need to a seat for a 14 week old unless they do not like to be held or they can only sleep in the carseat or bed.
If you are traveling with your husband and it is 3 seats in some of the rows book an isle and window so the middle seat could stay empty. If someone sits there they will love to switch with you but if they don't bring the car seat onto the plane. Ask the desk at the gate if the seat is empty.
You can take the combo stroller car seat to the plane and they will put it under the plane at the gate and bring it out when you get off. You get a tag at the desk at the gate
For the ears - feed your baby. Make sure you wait to do this until the plane is off the ground. Don't make the mistake I did and start feeding when the plane leaves the gate. It can take up to an hour for the plane to go in the air and then the child doesn't want to eat.
The only natural seditive is chamomile. You can have the tea yourself and then breast feed or you can get drops from the natural food store.
One more thing. Remember the 3 oz rule for bottles. That is for everything but baby bottles. You don't need to know this but other might like to know. They do not sell milk on planes and you can bring it through security so make sure you buy a lot at McDonalds.
Make sure you take a diaper bag of diapers, toys, blanket, extra clothes, and wipes, and bottles if needed.
Also you are aloud to carry on one bag per seat you pay for. Purses do not count as a carry on.
I flew from PA to CA with my three month old and had no problems. Good luck.