Why do doubt myself so much despite accomplishing many things in my life.

I own three small buisnesses, go to school, workout, work and help provide for my family. It's just never enough it seems. I wonder why I feel like I always have to do accomplish something yet it's never enough. I wonder why I feel stuck and anxious most of the time hiding behind a I can do it all attitude, and putting on a strong facade. Once I get home, the mask falls off and I feel the self doubt and anxiety creeping in. Sometimes that mask that falls off comes out in between my strong facade and it makes me wonder whether I am the strong facade or the self doubt and anxiety. Never shared this with anyone really. Writing this makes me feel at ease and at peace in all honesty. Any advice would suffice. Thank you <3