I'm a school teacher and I will start in a new school after Christmas break.
I just found out I'm pregnant
we are very happy but this wasn't planned.
I'm going to be 23 weeks pregnant when I start working at my new school 
I feel very guilty as this is my dream school and I was over the moon when they told me I was successful. I feel very overwhelmed as I really want to do well but I know I won't be able to give 100% and I won't be able to finish the whole year (due 1st May) 
I know I don't need to let them know until 15 weeks before due date (this is after I start) but obviously they will need to make arrangements. How early would you let them know? obviously not before the first scan but waiting until the second might be too late as it will be around Christmas time and they won't be able to do much (I'm not sure what they can do, maybe some risk assessments because of covid) I'm not sure how to tell them
I don't have any symptoms yet but I'm very scared if I'm going to need days off for don't feeling well and for hospital appointments and also all the stress because I'm starting in a new school in the middle of the year. We also need to move to another part of the country as this was the main reason for leaving my current school.
I'm a bit freaking out, I would appreciate any comments