Feeling broken

So this morning I dropped my baby girl off so I could goto work and she started crying and it killed me. Its already hard for me to leave her so I can work and this morning a piece of me died with her crying for me. Before all the negative comments on me working and leaving my child starts I HAVE to work or my husband and I struggle to make ends meet. Hes trying to get a job where I can stay at home but so far no luck..... how can I deal with this heartache of leaving my child so I can provide for her?