Sudden burst of energy

So ever since 37 weeks I’ve been dead tired, impatient, irritable, just the worst. I would nap all day. Well today, I wake up with absolutely no pain, I’m well rested, and ready to clean the house, grocery shop (which I’ve hated all pregnancy by the way), make my husband breakfast, and just get all the little stuff done I’ve been neglecting. Obviously I may be nesting but I feel great. I had to look down and feel my stomach bc a 39 week pregnant woman just never feels this good. I don’t want to get my hopes up but why I do I feel so great all of a sudden? Will I regret this all later? I’m very skeptical of this burst of energy. Is labor maybe near?