I am 20 weeks on Saturday and feeling unbelievably exhausted. I can barely hold my head up, never mind get out of bed. I've had to take the day off work today so am now feeling incredibly guilty. I'm not sleeping terribly well due to shoulder pain, frequent peeing and stuffy nose but this level of tiredness seems excessive even for that. Should I go to the doctor? I'm also a bit concerned that I'm not gaining enough weight. I've put on 5lbs but not sure if that's enough or not. I haven't felt my baby kick yet and I'm worried that all these things together means something's wrong!