3 betting turn out of position without a river plan

[geormiet]

8 handed online game

The BB is unknown.

I open raise in the sb with 66, bb calls. The flop is 558, two hearts.

I bet, bb calls quickly.

Turn is an offsuit 3. I bet, bb raises very quickly.

Due to the speed at which he acted, and the circumstances, I feel like my pair is probably good a great portion of the time.

Calling down is an easy way to play it. However, he could easy have some stupid overcards that I would be happy to have him fold for 1 more bet.

Anyone prefer a 3 bet? If so, what do you do on the river when he calls?