Cramming problem?

<p>So I crammed multivariable calculus in 3 weeks and was getting high 90s/100s on MIT/Cornell prelims & exams. </p>

<p>Then I got a headache that lasted 2 whole days and I seem to have forgotten EVERYTHING.</p>

<p>And now that I'm trying to relearn the material it feels like I already know it but for some reason can barely do the problems.</p>

<p>Cramming is almost always a short-term solution (though I’m sure plenty of people will come brag about how it isn’t for them). I’m not really surprised.</p>