Could you check my English writing, please?

Finally my niece was born today at about 8 o'clock in this morning. I went to work ealier for my sister's husband and worked five hours. My sister's husband called me during my work. He said she gave a birth! How wonderful! I went to the hospital after work and saw my niece. I was a little surprised that she was smaller than I thought. She wa so small and young that she didn't look like a girl or a boy. She wrapped in white fabric and her face was showing between the fabric.