It might now be extremely difficult to sleep at night, as turning and changing positions will get difficult. You might also need to get up frequently to urinate which will also disturb your sleep. This is probably just nature’s way of preparing you for sleepless nights ahead!
Excessive tiredness might happen often now and every ache and pain that you feel in your abdomen will raise an alarm, since you are expecting to go into labor anytime now!
By this week, fatigue might set in again and it's perfectly fine to be tired at this point, given the physical strain, the restless nights and frequent pee breaks you are undergoing at the moment.