Feeling like I'm failing

Between trying to be a good parent, keep on top of house work, grocery shopping, laundry, cooking healthy meals and exercising/losing weight I feel like such a failure...like no matter how hard I try I just can't keep on top of everything. I feel like I should have the time but somehow I just can't manage to get it all done. I have a high standard for my home and myself and it seems like ever since having a baby I have become mediocre at everything and it feels awful. Sorry for the negative post, just needed to vent.