I'm a nurse in an icu, so i work in a stressful environment. Every day is a struggle for me at work because of poor self-esteem. I finally feel confident or like I've made the right decision for my patient and something, no matter how small, takes be back to square one. It can be something a co-worker says, a grumpy doctor, a grumpy patient, my boss (who only points out negatives), or just missing something small and irrelevant. I've had one event knock my confidence out for months, but you just have to keep going. I'm taking my meds and talk to my therapist about it.