Sleeping issues

My 5 1/2 month old used to sleep fairly well. He would fall asleep around 7:30-8 and then not wake up to eat until 3-5. Now he’s waking up 30 minutes to an hour after being put down (I rock him back to bed), he wakes up at 1, doesn’t go back to bed (he is restless the whole time, he wiggles and thrashes around), and then wakes up crying at 5:30-6 am and doesn’t go back to bed. I’m exhausted and I’m two weeks will be moving across country to be back home and will be all alone. I’m stressing out, nervous, and scared I won’t be able to do it alone. Please help😥 he could be teething but I’ve tried gripe water, other calming droplets, Tylenol and more. Also tried things for gas thinking that could be why he’s restless and nothing.