I think you'll be fine, krystine. I do think the exhaustion has as much negative effect on your supply as that extra session could have a positive effect. As in, I think the extra exhaustion in getting up at that time is cancelling out any stimulatory effects of your supply. Not to mention the effects of exhaustion on your overall ability to care for your three kids. Just try it and see what happens. The fact that you have the two trusted dedicated donors and lots of milk in the fridge gives you room to experiment a bit and see what happens.