her "feeling pregnant" is more likely cause from her period coming soon. you cant get pregnant through anal or oral sex only vaginal intercourse.
As far as I understand it, you did not have vaginal intercourse, e.g. your penis did not come into contact with her vagina and moreover, there was no ejaculation. I would say she is not pregnant, do not worry. Her worries are probably mainly in her head. Again, I do not know when it happened, but I cannot understand what it means that "she feels pregnant"...Probably some irrational fear.