As if I don't feel bad enough dropping him off at daycare and him crying

I dropped him off this morning and as I was leaving he was happily playing and a kid came up to him and pushed him over and now I've just got a call that he's been bitten (this is the second time) by another child at daycare and has needed a plaster and Ice pack and apparently they've filled an incident report

I feel so bad and just want to wrap him up and cuddle him he's only 19 months old , do I need to get him tested from the bite? My poor baby he's such a quiet gentle boy he just gets pushed around