Have a look at your apprentice and guru items. I suspect they might be a bit high at this point. Especially apprentice items will affect your immediate review load.
Have a look at wkstats.com to see how many items you have in the lowest apprentice categories, as even if you get to those today, they will come back once, twice, or even more often over the next 12 hours depending on if you answer correctly or not.
Using a script like [Userscript] WaniKani Dashboard SRS and Leech Breakdown can help you keep an eye on workload better.
I do see you’re on mobile, though. I think you need to be on a desktop/laptop to install and use the script.