I've just realised we're on about a week of one nap days

He's sleeping at least 13 hours at night and about a 2 hour nap in the day. I decided that if he woke after 730am, we'd do a one nap day and if he woke before then, we'd do a two nap day. Well, even if he's waking at 7am and I put him down in morning, he'll sleep a couple of hours and then refuse pm nap anyway. He's going to bed at 6pm every night and waking up sometime after 7am the next morning. Last night he went straight through but on Sunday he woke at 6am for a feed and then went back to sleep till 745am. Due to school runs nap is 1230pm-230pm.
Unfortunately he's spent most the day throwing up so imagine I'll be hearing from him in the night tonight and hopefully things won't get thrown off track too badly.