Resigning?

Hello ladies!

I am a military spouse, the current job that I have right now isn’t being very military spouse friendly. They won’t accept my schedule anymore and they have been accommodating but they told me I have to have a back up plan now. Because I have no daycare to watch my daughter while I’m working and my husband is working. And I have no friends or family to watch my daughter.

So my question is how do I write my resignation letter that includes how I feel without it being unprofessional? Or should I not even say how they won’t be accommodating me anymore and what not? I just need advice I feel so hurt.