If I generally eat seudah shlishis within about 30 min before shekiah, then go daven maariv less than an hour later, it’s likely that I’m not at all hungry when I come home to make havdallah. I remember learning that one should not do any melacha after havdallah before eating a melaveh malka. Am I required to eat right after havdallah even if I am not at all hungry? I want to do melaveh malka properly (i.e. right away) but it feels like achilah gassa (eating when I am full).
It is preferable to eat right after havdallah, however if you are full and you can’t wash you can eat a k’zayis of cake etc., and wash later when you can eat. If it will actually be achila gassa, then you are not allowed to eat anything now, and you’ll have to wait for later.
For the future it would be advisable not to eat so much at shalosh seudos so you won’t have this issue.