My Uniform doesn't fit!!

So as many of you know I am in the service, more specifically the Marine Corps and we were uniforms. Well I must say mine is getting so tight!! They have maternity uniforms but neither base near me carriers desert maternity cammies in my size they only have extra small!!! I have a set of green maternity cammies but we don't change to greens until time change which is in November this year ! Boo!!! I really wish I could get a pair of deserts because mine are so uncomfortable, I have been getting away with unbuttoning the top button of my pants but they are still uncomfortable ! Very frustrated!