Suho would be really concerned about your health, he’d want you to try eating something, even just soup. If you really weren’t up to eating he’d get you a nutritional drink so you at least got the nutrients you need! In the meantime, he’d take you to the doctor to make sure nothing was seriously wrong!
Kris would be a lot like Suho, except he’d take you to the doctor first. If the doctor said you were overall fine, he’d just force feed you something light like cuppa soup and keep you in bed until you were feeling better!
Jongdae would probably freak out mentally that you might be pregnant and he’d want to take you to the doctor. Once the doctor tells him you’re just sick he’d relax and happily take care of you for the next few days, feeding you soup and hot drinks until you were well again.