Is this normal?

Turned 34 weeks yesterday and ever since Yesterday morning I've been so tired as in barely able to keep my eyes open, my back is killing me, I have bad pain in my pelvis/pubic bone so bad I can barely walk and about an hour ago I was shivering and now I feel really hot but my hands and feet are still cold, and got slight cramps, someone told me it could be a sign of labour but I don't know what to think?