Bawling my eyes out 😭

I'm 28 weeks pregnant and trying to potty train my 2 year old. For some reason, he has a fetish with playing in his poop. I can usually change him fast enough throughout the day so that he doesn't play in it, but during nap time or bed time, I would always end up having to clean walls and beds of poop. It's disgusting. I tried everything, time outs, fastening his diaper on backwards, putting him in sleepers (he takes them off, even backwards), checking on him every thirty minutes. Nothing worked. I came across this thread when I was googling advice, and many women have had this issue with their LO and said the ONLY thing that worked was a cold shower. It sounded so cruel, but after three nights in a row having to wipe poop off his bed and give him a bath, I decided to try it. About ten minutes ago, he came downstairs with his hands painted in poop (he sleeps in a toddler bed, so he's able to roam), and I gave him a cold shower. It broke my heart, hearing him cry as the cold water hit his arms as I wiped them off, but I stuck to my guns hoping this would be the only time I'd have to do it. After I turned the shower off, he was happy again and ready to play. I put him to bed in fresh pajamas and a clean sheet. I'm hoping this works, because I can't do it again.  I can't stop crying. 😭