Thanks guys. I know it's just an unlucky accident. Had quite a few of those unfortunately. D:
Anyways, I went out betta hunting. Didn't see one that caught my eye like the rest of them. Although I will say that Petsmart really impressed me with their fish department. All the bettas were alive, some had bubblenests, and they had less stock so not as many will die. The rest of the fish I was looking at all looked really goood too! Wal-mart was actually decent. All bettas alive and no gross plants in the cups, although not much of a selection. On the reverse side, Petco was good before but has been letting things slip. :/
I ended up just buying betta bulbs, got 10 of them in total but knew that one right away wasn't going to be good, so I have 9 left. I put them in a dip 'n pour so they won't contaminate my water if they go bad but they can still get good lighting. Hoping they'll grow.
And I'll be on the look out for a new friend.