Others can weigh in on this but it seems like there is a "tipping point" for some of us and once symptoms start, they progress and/or others follow quickly.
It's like once there's enough pressure from the tumor to cause
one symptom, others aren't far behind. I have a blood vessel tumor known for causing symptoms at a very small size, but I have noticed this with posters on here with this happen as well. SOMETIMES. Others seem to watch and wait more successfully, but for me, once symptoms started they came fast and furious.
As always, that is strictly my own observation and I claim no medical validity for it.
"Needing a cup of coffee" may be a variation on "wonky-headedness," the hard-to-describe not-quite-focused brain, or brain fog, many of us feel to some degree.
ETA: I mentally morphed two posts into one and answered them both here, part belonging elsewhere. See, wonky-headed!