People mad at me now...should i feel guilty?!?!?

first of all, I work at a vet clinic. I've been saving up to fly to Calif with friends. When my friend told me the date for the days we are going (she can not go ANY other time because she just started this new job) so anyway, another tech i work with is taking off for one of the weeks i am gone. she's been there for about 8 years, and she said that the doctors will say it's ok for both of us to take off and she said, "everything will be fine, it's okay you can still do your trip". so i talked to one of the docs and he said it was okay to take off for two weeks. i told him "are you sure? i know this is a lot to ask for". he said it's all good. well, one of the techs (who isnt taking a vaca this year) is now mad at me and isnt talking to me because she now knows that since they will be two techs short she will have to work more hours for the week. i feel HORRIBE! should i feel guity for this?!? i've been crying over it because i hate being hated!!!