Single parent by de facto

Having a difficult time with my 11 month old.  I love my daughter very much, however my life seems to have changed so dramatically that I do not recognise myself anymore and feel that motherhood has turned me into the worst version of myself.  When I look in the mirror I want to cry...I am irritable all the time when my husband comes home for the weekend - I am exhausted and feel empty and yet with few family or friends around I have no option but to keep going if only for my daughters sake...I am always a flip switch away from shouting at my cats, something I feel terrible about - I know it's just a combination of my frustrations, exhaustion and irritability but I feel so guilty.  Being home 24hrs a day looking after my daughter is so hard I just don't know how to recharge myself when I'm alone and responsible for my daughter all the time...