Exhausted.

I am 30 weeks pregnant and my SO has been less than supportive. I still go to work and come home exhausted and my back hurts so bad I can barely bend down anymore because when I do I get a sharp pain in my back that shoots down to my left leg. My appts are now every 2 weeks and since I haven't been at my job for a year yet they aren't obligated to make any accommodations for me so they don't want to work around my appts. I still go to work everyday but my SO thinks that I am making all this up because I don't want to work. If that was the case I would have just quit already and as far as the pain there isn't much I can do for that but it's hard for me to move around now and he just doesn't understand I work and try my best not to miss any days although I don't feel good at all. I am paycheck to paycheck because I need to take care of my car payment and insurance. My SO doesn't think it's his obligation to assist me with anything. I feel so down all the time as well as stressed and in pain. I don't know how to explain to him that pregnancy is hard and when I am dealing with added things on top it becomes unbearable at times it feels like no matter how much I try to explain I just can't because he will never go through it and won't even make an effort to put himself in my shoes. I'm just too tired for all this and feel so misunderstood and ignored....