Morning sickness and work

My morning sickness is severe and I'm unable to focus on my job. I'm either throwing up or have such severe nausea that I literally can't focus on anything other than how sick I feel. I've already missed one week of work, came back to work today to try to stick it out and am already feeling so ill. I was wondering if any of you have been able to go on temporary disability to get through the first stage of pregnancy? I'm afraid of missing more work. It's starting to stress me out cause my job is being so NOT understanding with my situation. I don't know what to do.