All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
It is not permissible for the woman to abort her fetus due to anxiety about her delivery because she underwent painful experience in her last pregnancy. In fact, every woman who undergoes pregnancy and gives birth has to face this pain as a natural matter. So, this woman is not permitted to "remove" the pregnancy after it has occurred. Allah Says (what means): {And when he goes away, he strives throughout the land to cause corruption therein and destroy crops and animals. And Allah does not like corruption.}[Quran 2:205].
Abortion is permitted only when a reliable medical specialist confirms that continuing in the state of pregnancy is dangerous for the life of the woman and there is no other way to avoid this danger. But if the woman does not face any danger for her life then abortion is not permissible for her at all.
The pregnant woman should fear Allah and ask Allah's Help and Support for herself. Surely, Allah will ease her from all troubles and grant her much strength to bear this burden. In addition, she should pay attention to her nutrition since good nutrition helps to prevent health problems and provide the woman with sufficient strength to bear such pains. Also, she should consult doctors to receive proper treatment.
All the above matters will bring some help. May Allah Help you and Bring goodness in your life.
Allah knows best.