Help! The flu is here

So my sister SO was sick for like 3 weeks and ended up getting my sister sick, she went to the hospital yesterday due to a lot of pain. While she was there she caught the FLU from other in the ER waiting room (*doctors confirmed this*) her 10 yr old son has been sick for over a week and now her 7 yr old son got pulled out of school for having the flu. They all live with my husband and I! I'm 23 weeks pregnant and woke up with a headache. All I hear is coughing and wheezing like crazy in this house. Doctors told them to stay away from me but it's hard when we are all in the same household! I cant afford to be sick ( I have MS which already makes it very easy to get sick.. plus I have a high risk pregnancy ) my husband is angry although its obvious there's nothing they can do to avoid it. But he really doesn't want me to get sick. Any advice?