Mama, I'd really suggest you bring baby to the doctor or clinic today to check on her, lalo na fresh lang ang vaccine, better safe than sorry! Light green vomit after vaccination needs to be checked out proper, kaya please don't wait. One of my mum friends' baby had similar reaction din, but the pedia said it was important to confirm kung normal lang or may iba pang nangyari. You're doing great reaching out, pero ang doctor ang makakasiguro talaga.