Level 33 is way too low for Quesh. You really do need to backtrack and do some non-story line quests or some space missions. You get exp, credits, and affection with Mako and it's always a help. I am level 39 and just finished Quesh, and I have over 400k credits in the bank and doing fine.
As an Arsenel Merc, it is a little tough but Mako really starts to shine at level 35. She gets an aoe heal at level 35 and now I can do elites with almost no problem. Even melee arent hard any more. I admit the tracer spam is a little boring, but Mako and I make a great team - we just roll over everything.
There's a bonus series on Nar Shadaa right at your level, and Tat/Aderaan should offer more quests than youve probably found.