1-3 W through your four years in college are not bad at all, most. graduate schools actually expect them. Whether its due to family issues, health, or just personal issues, a simple statement in your essay to your grad school will clear it up, they don't care about a W, they care about research.
I already have a W simply because I got stressed over with a full load (20+ units). I regret it, but I spoke to my advisers and ALL of them say it doesn't really matter AT ALL.
So don't sweat it if you have 1 W in your 1-2 years in college or even 3, just don't get anymore than that haha!