Employers are unbarable

I told my employer about 3 weeks ago I was pregnant, I'm currently nearly 8 weeks I had to tell them early because of the nature of my work. I work for a agency I've been moved from my normal place of work to 25 miles away (probably because I'm pregnant) involving a lot of travelling. Doing nearly 60 hours a week which includes sleeping over. I don't get much sleep as I'm woken up in the night by the person I look after. Told my employer today it's all too much I'm suffering with lack of sleep and terrible nausea I'm constantly tired. I got the response of will try to cover your shifts blah blah ... They really don't give a shit. I'm going to see my doctors tomorrow I'm hoping she suggests me taking a few weeks off. Which my employer will probably go funny about but I really don't care. Anyone offer me advice on what to do or is anyone having similar problems? Thanks