Low mood

21 weeks and constant low mood and lack of energy. Recent family bereavement and also started a new job (redeployed) which is so stressful and I hate. Had some days of sick but don't feel any better; tearful and physically sick before going work. I just don't know what to do! I know I need rest and not stress but I don't want to avoid work as just putting off returning and making myself worse!! A