NLTRN $10 Small overpair facing PSB on paired river...

[waxhax0rs]

http://www.pokerhand.org/?1658215

Second hand.

First hand he limped and we checked to the river. The board rolled out AK7A7 and he minbet the river and I called and he showed J4o for the split.

So my question is what should I do in this spot? How often is this the 3 or a straight or a set? One thing that kinda made me call was that if he hit two pair with 86 or something then I just resucked on him so that's another way I could be ahead but really idk....Do people call down then pot-donk a 3 like this?