I've heard that too. Along with the apparent external signs of an 'uptick in mood' (for want of a better phrase) when someone resolves to end it: IE. a lifting of a burden.
I'd also like to say, to anyone reading this who is entertaining thoughts of self-harm or suicide: Please, please reach out for help. In my mother's case her suffering was almost certainly compounded by an irrational shame and self-imposed stigma. I'm just an armchair critic, if you are taking medication and you feel like it is helping - it is. If it isn't helping, please talk to your healthcare professionals about alternative treatment - there are always other options that don't involve hurting those who love you