Financial struggles

My date of birth is 11/19/1978. I am a mother of 2 boys and I have another child on the way that will be due around April. I am a very hard worker but never seem to get a break when it comes to my finances. Something always come up and I never can seem to be ok financially. I also applied for a better position at my job but have not received any responses on the position. Will I ever be financially secure or will I always struggle for everything?