Sleep training - night 2

Did anyone else’s baby seem to do worse on night 2 than night 1? Using modified version of the Ferber method...basically just keeping the same check in frequency as night 1 because I can’t stand to let my baby go longer than 10 minutes.

He went to sleep great...was out in 10 minutes with no real crying, just some fussing. Compared to about 45 minutes of crying yesterday. I was so excited and thought I was in the clear. Then about 40 minutes later he started waking up. It’s been wake ups about every 30-60 minutes since. Goes back to sleep fairly quickly but he didn’t wake up this frequently last night. Please tell me someone saw something similar with their baby and that it gets better. I really had my hopes up when he went to bed so easily at first