Playing some $25 to shake rust off after not playing cash for around a week and had this hand come up on Bovada Zone

I open the cutoff to $.75 w/J7 of hearts, button calls, and blinds fold

Flop: Qd 6h 5s
I bet $.99, call

Turn: 3d
I bet $2, call

River: 4d
I bet $4.50 into $7.25 after rake, and he ships for $13.xx. I have to call $13 to win ~$30.50. Seems like a snapcall, right? I ended up losing to a flush but looking at it now, it seems like I should fold because 78 got there as well. Pretty frustrating as well because I don't think my barrel on the turn is especially good as not much folds on turn that didn't on flop.