Toddler not sleeping.

So I have a 2 year old nearly 3, and be not a good sleeper at all, he wakes like every hour sometimes wakes the odd 15 mins. I have work Monday -Friday 8:30-5pm and I’m up like 9 times a night. Iv spoken to his health visitor and she doesn’t know what to suggest as Iv tried all the obvious things. Bed later bed earlier, no tv. Before bed, play puzzle games, read story, bottle for bed, go for a walk or park tire him out, bed spray (lavender) night light, baby music. None of it works. Me and my ex split up beginning of year so my son is with me 4 nights a week then with his dad the rest, he sleeps fine with my ex, well so he says, but he doesn’t sleep well with me. Iv even been sleeping in his room in a spare bed so he knows I’m in his room with him hoping he sleep better which he does he wakes twice in the night but this isn’t good for me and my boyfriend, I never get to sleep with him now. I’m so tired I just want my son to sleep. Any ideas? Tips? I’m trying him in his bed but with my pillow and duvet tonight, if not I’ll try him in my spare bed Iv been sleeping in but no bed guard up, maybe it’s the bed guard as don’t think he has one at his dads.