Do your little ones do this...

My little one has been squirming, making grunting noises, arching his back, fidgeting his head, kicking and sometimes cries very low while asleep. This has been going on for the past two days. I'm planning to go to the pediatrician tomorrow (this morning). He jus turned 6 weeks. He is also waking up every 20-40 min and stays awake for hours without a nap. And any little noise wakes him up, even the squeak of a door opening. The only way I can put him to sleep is if I take him on a car or stroller ride. Anyone can relate ?? What did they tell you it was ?? How did you soothe them?