No, you can only travel with a mahram man. He only needs to bring you there, and while you are there, he is not required to stay with you.

I live in Nigeria and married with children.I have a brother who lives in Sweden with his wife and two little kids. His wife is pregnant. Her pregnancy is very tough as she has to stay in the hospital for the first 3 months. My brother works and there is no relative to take care of the children and the wife herself. s it permissible for me to travel there alone?