Good job on keeping your grades high!  Remember that you will also need leadership and athletic activities.

In college it does not matter what degree you get.  Being strong in math and science wouldn't hurt though.  Your grades and performance in college determine your chances to get into pilot training. 

Women do fine as pilots...in fact, there have been studies that show women can take G forces better than men.  The USAF Thunderbirds have a woman flying in the number 3 slot (right side of the diamond) right now.