A wrong fold ?

Pacific Poker FL 2$/4$ 10-handed
Folded to Hero in UTG+2 with 2d 2c who calls 2$, MP2 raises 4$, CO coldcalls 4$, BB calls 2$, Hero calls 2$.

Flop: 3d Jd 4c

BB checks, Hero checks, MP2 bets 2$, CO folds,BB folds, Hero folds.

In the end I am heads up with the preflop raiser and with the last 1,9$ there is now 18,05$ in the pot.
I was not mentally prepared for this situation, the session was approaching its end and I wanted to finish it as a winner ( I had a little profit.)The last fact should not influence my decision, but it may have done it.
Was the pot so big that I should not follow my plan of folding if I did not flop three of a kind ?
In the seconds that followed,I managed(I think now) to choose to the worst of the three alternatives that were available to me, I folded.
I think that I should have raised and I can present calculations that strengthens this statement, I think.
Even with a win rate of 4,2 BB/100 after 23K hands I am just a big fish that is eating smaller fish in the biggest aquarium on the internet, Pacific Poker, and still often not confident that I am making the right decisions.
Comments ?