Sons teacher wants to have a conference

Amanda • I`m going through a separation. I have a 5 yr old. Had one ectopic pregnancy back in December. Pregnant with baby #2!!
I moved my son to another school, unfortunately right in the middle of the school year... He's in kindergarten.. He has been there 2 weeks .. Well I took him to school today and she told me she wanted to have a conference with me about what he did at his other school and what they were teaching him. I'm worried because I just know she's going to want to hold him back or something. I feel like a shitty mom because of this. I feel like I've failed him. I know a conference with a teacher is never a good thing. I can't stop stressing.