HELP !!. it's URGENT question!.

Hello ladies hope your all doing fine ❤️. I wanted to ask you I'm going to travel pretty soon for a few days and I'm not taking my baby with me she's 2 months old and I'm breastfeeding her but also giving her formula milk if needed. But I did not pump enough milk for her is it okay to give her formula until the day I come back then go back to breastfeeding?. Or not ?. Did any of you ladies try that method ?. Please help I don't want her not wanting my breasts. I'm so worried and anxious!.