moving in the middle of a school year- good or bad?

I have been stressing so much in the last little while and wonder if anyone has any advice from personal experience on this.
About a year and half ago my husband and our two kids moved about 2 hours away from our home town due to my husbands work. I have absolutely hated every second here. First reason being my dad is dying of a brain tumor and has very little time left and I have resented very much being so far away from him and second of all I am shy so it has made it very hard to make friends. Its just me and the kids. anyway my husband worked some miracles and was able to get a job back closer to our home town so we could move back. I am so excited but my worries now are that I am hurting my 8 year old by making her switch schools yet again and in the middle of a school year to top it off. My daughter is excited to move back and not at all worried about making new friends but I worry that I am putting too much on her with the new school in the middle of the year. In canada or I should say Ontario as I don't know about other provinces they have this grade 3 testing to determine if your child is learning everything they need to and such and its important stuff, I worry that I will screw that up for her. Am I the only one who has ever moved my kid in the middle of a school year? Am I being a horrible mother for doing this to her?
I have lost so much sleep over this so if anyone has any advice it would be so appreciated.