My son is staring this year, so my second child to go to school so I feel a bit more okay and relaxed, especially because he is so excited! With my first I felt exactly the same, but everyday hearing her come home telling me about all these new things she'd learnt, seeing her interact and contribute to things more, hearing her tell me about things I never knew she knew.... it filled me with so much joy to see her becoming this clever little being! Plus all her friends she made, craft she'd bring home... it quickly became okay. Yes it can be sad and upsetting at first, but it's an amazing milestone which will just leave you in awe of the gorgeous, independent and unique little being that is your 'big' baby Its wonderful seeing them start to develop preferences for things they like, choices for sports or music - you really see their own unique side coming out even more, and I love it