I don't have a hand history to show...I'll try to explain it quickly...
I was playing a full ring $0.01-$0.02 cash game and was in a limped pot with two others. Villains often limped into pots but folded to cbets/probe bets when they had nothing. So their range is pretty big. On the flop the OOP player led out and I had nice implied odds on the flop to hit my open ender and so I took it.
The player behind me just called. The turn came out and completed my straight. The flop contained two J's and my straight was probably nicely concealed.
The OOP player led out again and I called as did the player behind me.
I put the OOP player on basically nothing or 2 pair. I felt like he opened the pot to start and was just continuing his aggression. The player behind me I was praying he held a J and hit his set or was drawing to the nut straight (mine was best at the time but if the right card came out he could have the better straight).
The river was nothing. OOP player checks, I bet out 1/2 pot hoping to get raised, I did by the player behind (he shoved) and the OOP folded.

The player behind had slowplayed a full house that he hit on the flop. It was a cooler, and an unlikely holding, but should I have been wary of it? Or do I have to just assume I am ahead? There were 13x Jack combos he could have in his hand and only 4 of them spelled doom (JJ gives quads, and 3 other JX combos gives a FH).
That leaves 9 where he is crushed and I rake in the pot.

How are we to approach a hand when the board is paired? I doubt he would have bet any different unless he had the lowest of the Jack combos (J2 - J5). Could I really fold in a micro stakes game??