Hoping some external viewpoints will help me get my head straight as I'm going round in circles, hence being up at this time 
DD is 1, DH is a SAHD. I returned to work in April 4 days a week. We can manage on my part time wage if we are very sensible but to do so I have to do 4 long days rather than just standard hours.
I feel I'm getting the worse of both worlds.
Four days a week isn't part time enough to be truly part time so in essence I'm doing a full time job, a lot happens on my day off and missing meetings etc. is starting to cause me difficulties as I'm out of the loop on decisions etc.
Because of the long days I'm knackered on my day off so whilst I'll do something with DD in the morning I'm generally to tired in the afternoon and just 'wasting' the time.
I'm also missing my pre-child hobby but can't start it up as don't have the money and have no time on the evenings I work so would be limited to once or twice a week (which would frustrate me more then not doing it and would eat into our family time).
If I return to full time I will be on flexi so can start early and be finished by 3 / 3:30. I work close to home so often meet DH for lunch giving me more time with DD. This will give the flexibility in terms of money and time to pick up my hobby again and I feel I'd make more of the time I had with DD as it would be more precious IYSWIM
I just feel incredibly guilty as I feel like I'm sacrificing my day with DD so I can have more time and money for myself, almost feel that at this age it should be about her and I should just sacrifice my interests.
Has anyone any advice for me before my head explodes 