bed time post early wake

my 4.5 month old woke up at 5:40 today and fussed on and off until i got her at 6:15. bedtime last night was 7:20. wake windows so far have been 2.3/2.5/2 and her first 2 naps were exactly 30 minutes. currently on her first nap that started around 1:30 and still going at 2:15. i want to try to keep bedtime consistent but how the heck to do get her there? shorter last two wake windows? wake her up from this nap then a cat nap around 4:30? i’m worried she’ll have too much wake time today and cry a lot before bed. we’ve been having success with ferber for bed time so don’t want to mess anything up! thanks!