Nap Advice 🥲

Hi mamas! I need some nap training advice - After trying everything else in the book I decided to try the cry-it-out method with my 14 month old for naps (he sleeps just fine by himself at night) and I’m having some issues with him falling back asleep after one sleep cycle. He got the hang of falling asleep by himself right away after the first day (he only cried for a little before doing so) and on the first day he woke up after 45 minutes, fussed for about 8 minutes and then fell back asleep.

We are on day 4 now and he goes to sleep in less than 5 minutes but he wakes up after about 45 minutes (a sleep cycle) and cannot put himself back to sleep. Prior to nap training he would nap for 2-3 hours once a day. I leave him in there for 15-20 minutes after he wakes up to give him a chance to go back to sleep and I can see that he’s trying but unable to. He has a sound machine and blackout curtains and a small lovey. Will this correct itself? Any advice helps, thank you!