Don't feel pregnant?

Has anyone experienced this? I woke up on Saturday full of energy and not in any pain. My back and pelvis have been in agony for a couple of weeks now, but as of Saturday that was all gone. Baby has been moving around normally so I do not think anything is wrong, but I'm wondering if this is an early sign of engagement?

Got some errands and cleaning out of the way before the back pain slowly crept back in, but I was so thankful to feel normal for a day!