Work problems

Help! Need advice!! I'm 18 weeks and four days and I'm currently out of work for a week per doctors orders. Long story short I was in work, the boss was in a mood and started taking it out on me, I didn't react too well to it. Then I started getting pains in my stomach which freaked me out as this is my first pregnancy. Ended up in the hospital to get a scan to make sure all was okay. Doctor told me baby was good but that I was exhausted and stressed and need to slow down with work, cut out split shifts and reduce my hours. I tried to talk to my manager about it and was essentially made to feel like I was just looking for special treatment because I'm pregnant and it would be unfair on the lads in work if they had to do loads of split shifts because I wanted to work less hours. Has anyone any advice for me on what to do? The way that both the boss and management have made me feel is making me stress even more and dread going back to work. Please help.