Its Always Something

Well today I take my truck to the mechanic to see whats up. I'm having trouble getting the truck into gear......any gear. Its happened twice in the last few days and now of course I'm nervous driving it. A friend helped out the first time, saw that the fluid was low (added some) and after many minutes of pumping the clutch it finally went into gear. But yesterday it happened again, so somethings up. I'm just hoping it doesn't involve having to replace the clutch, because I don't have that kind of money. I finally pay my rent and bills, have a few extra bucks in the bank, and now this. Its so frustrating, what do I do now?........how do I get to jobs so I can pay for the fix?......its always something.