I know that Im late reading this, but my 14 month old did exactly the same thing for about 3 weeks and it was just SO tiresome. He shrieked and whined ALL day and he wouldn't even let me hug him. Then it got remarkably worse - then one day, pop a molar tooth plus a change of sleep cycle - turns out he wanted to go from 2 to 1 sleep per day. It was HELL and then it got better. Stay strong, it will pass.