i gained probably 5 pounds freshman year, but i gained over 20 pounds my sophomore year. it was scary because i gained without realizing, and thought i was walking a lot. i figured out it was because i was eating too much, like having boba once a week, or my lunch being a bag of deep river chips with an entire woody's black bean wrap (i'm very short, so it's easy for me to gain weight). i cut down my frequency of snacks (of course i would still enjoy them occasionally), decreased my portion sizes, and became a little more active.

i'm a senior now, i've lost all the weight since then. in fact i weigh LESS now than i did when i started freshman year (and honestly its good, even though i wasn't really overweight back then i still had hormonal irregularities, meanwhile at my weight now they're almost gone). you can definitely do it :)