I'm 31 weeks pregnant, I'm exhausted, I can barely walk I have bad pelvic girldle pain, I'm wobbling, I'm still occasionally being sick, I have gestational diabetes, I'm not sleeping well, if I ring the doctor can he issue me a sick note to go off work for a week or two? I need a break. I'm so tired. I go off work in 5 weeks but I'm finding it so difficult to hold out. What should I do? Any advice. Thanks