My friend tells quite a few lies, but they are generally very small and I'm unsure why she does it. I work with her as well.
She had the day off work because she found a lump and went for tests.
A week later she said she got a text saying her results were in and that she needed to come back into hospital urgently. So another day off work.
I went to her house to see afterwards and she said that they said they were just worried because her blood pressure was high 
I hate doubting her but aibu to think she might have been lying?