Block this river or just check fold?

[SGS]

I have 49cc in the SB of a 1/2 game. I just started and have around the starting 200. There's a limper and I complete. The BB checks.

FLOP J,9,4

I check, BB checks, limper makes it 5 i raise to 15 and the BB folds. Limper calls. Limper has me covered.

Turn 4

I bet out 20 and the limper calls.

River J

Plan? Thanks in advance.

SGS