Preschool Nervousness. Help?

Hello everyone.

My first born is starting school in this coming September and I am extremely anxious. I am just not ready for the first week with all the tears and fears lol. I know she will be great. She is very intelligent. She is 3 and knows shapes, colors, some letters, and numbers from 1-10. She is in In a home daycare and has been going there since she was 6 weeks old. The problem is I fear that she will think she will lose me. Her father was recently murdered in November. He hadn't saw her in a year and some months before he died, but she remembered him and grieved deeply at his funeral when we went up to the casket... I know September is a long way from now, but I want to get my anxiety out before then. Any advice????