Nap troubles

My 7 week old has no problems taking naps during the day, the only issue is he will ONLY take them if he is sleeping on my chest. I don't mind the extra snuggles but I'm not always able to nap with him this way and I certainly can't get anything done. I've tried laying him down where he sleeps at night (has no issues sleeping there for hours at a time at night), but he wakes up within five minutes crying. I'm a teacher so I have the whole summer off with him but I am worried about how this will go when I start back. Any suggestions? I'm a first time mom so any advice is welcomed!