hopefully you are sleeping & not reading this til morning. How old is bubs....it could be teeth.
When Charlie first started moving about the cot he would wake a little, but only once or twice...as the cot is very large & when in deep sleep he wouldn't move around too much.
Have you tried any panadol or nurofen.....if it's teeth then could be the pain waking him up. Charlie woke every hour or two when his first 2teeth cut & we had no idea what was happening. Was like he was 4wks old again. We now can tell when he gets a bit of temp at night, has snotty nose and wakes before midnight........he gets a feed & some teething gel & if not settling nurofen & then usually gets a good sleep after that. Hope it gets better soon.
Perhaps you could borrow a sleep positioner off someone to see if it would help...I'm not sure of how much they cost but I would spend too much if he will be too big for it soon IYKWIM. I'd say if it's teeth then he's waking on all fours because that's prob his newest thing he's learnt. Charlie is always sitting up now when he wakes unsettled.
Hope you get some sleep soon.