Advice/quitting

I just started a new job working with disabled people and helping them be independent in their home... but I don’t know so far I’m not sure if I really like it... especially with my anxiety.. I do night shifts and one girl has seizures and wake up a few times during the night.. how do I tell my boss i want to put my two weeks because of my anxiety and I’m not comfortable..I don’t want to just quit and leave.