Anybody else have two days carrying completely different at this stage? Yesterday although I hadn't…

Anybody else have two days carrying completely different at this stage? Yesterday although I hadn't slept and felt like crap I was walking about ok not in too much discomfort, today my back my pelvis and my bump/ribs etc all hurt, it's like she's moved but I thought she would just stay head down from now on, maybe she's gone back to back and that's why I'm so uncomfy?