Back to work nightmare

Let me start by saying that I'm a very devoted employee. I'd go so far as to say that the majority of our clientele rely on and trust me, implicitly. That said, due to unforeseen complications, I was put on bedrest and disability through the remainder of my pregnancy, four months before my daughter was due. At that time, I was in tears, as I'd poured every ounce of energy into the company and I knew it would struggle without me. The owners and managers assured me that after I was cleared, my job would be waiting for me when I returned. Now, I went in to meet with them Monday to get a schedule and go over anything new, and was asked to put together a proposal of what I can do there, like I was applying for the first time. Then, they told me I'd hear back Monday on what they decided for me! This company was really struggling when I came on, so I spent countless hours in overtime, without reimbursement, in order to build it up. I was paid contract when they didn't want to pay for those hours, and when I was given hourly, they finally paid me a living wage, which I earned every red cent of. But I fell pregnant four months after getting paid hourly. I feel so betrayed and aggravated that I'd sacrificed so much to be treated like I was worthless because I don't hold degrees... I've learned everything myself, through necessity.

I'm so scared that I won't be able to provide for my children now- what can I DO?