Not coping with work and motherhood- anyone else?

[russianroulette]

I have a 3 year old dd and recently got a new job (in same organisation) so that I could change from working 4 to 3 days a week. The job is a promotion and even though I only work 3 days a week not coping at all well. The work is new to me and frankly, quite hard - have to spend hours drafting reports which makes my brain ache so much I just want to get home and unwind but of course have to collect dd from nursery and look after her. Made a mistake at work today which I keep obsessing about and its got to the point where I feel I just cant cope and I'm losing all my confidence, at work and as a mother. I know millions of women juggle work and childcare which makes me feel so crap that I cant seem to cope!!