Desperate to be done work

Hi all. 34 weeks and 3 days pregnant. My maternity leave starts 8/15, at 36 weeks, because my state offers 4 weeks of short term disability prior to your due date. But I want it to start now. I keep getting sick. In the beginning of June, last weekend and all today, I have been experiencing nausea, vomiting and either constipation/diarrhea, as well as lightheadedness and fatigue. I feel like I've been through a war, and I just want to feel better. I am dreading going to work tomorrow - I have a physically demanding job and I'm out and about in the heat. I have a high-risk pregnancy and have 3 doctor appointments a week now. My OB knows about the first time I got sick- they had me go to the ER. MFM knows about the second time - my BP was high in the office and they sent me to triage. I'll be telling them tomorrow that I was sick again today. Nausea/vomiting has not been a typical pregnancy symptom for me, so the fact that it's cropping up now and has happened 3 times in the 3rd trimester worries me, especially since I have GD and am at risk for developing preeclampsia. My OB's office is less than helpful though - they have said before that they can't write me out of work prior to 36 weeks. I feel like my issues and concerns get brushed off. I know I only have a week and a half left, it just feels like forever when you feel so awful. Anyone experiencing anything similar?