[AlanBostick]

I don't like reraising on third street here. Above and beyond the fact that OP says that there is little fold equity here, the basic situation is that the OP is behind, and, while getting a decent price to call and draw, adding additional bets to the pot at even money is negative-EV.

Definitely raise fourth -- because your equity has gone up, and your hand looks low. Bet fifth, because your equity has gone up still more.