If this set back is enough for you to come on to an internet message board to get anonymous advice about dropping it as a career weeks into your first 121 gig, you might not have the intestinal fortitude to handle the ups and downs of the aviation business.
This business is incredibly cyclical, as many have mentioned multiple times. The last few years have been boom, but the next unknown time will be bust. Can you handle the uncertainty of what the unknown time is? can you handle that within a few years there will be a boom cycle that gets the next generation all excited about where is the fastest place to get into the left seat so I can go get my golden job, while you've been slogging it out in the trenches, stuck commuting cross country to sit reserve in the right seat clapped out 145 or 200?
This job isn't jetting off to Monte Carlo with supermodel stewardesses rubbing suntan lotion on your back, while you're living the high life. A few might make it to that high platform, but those lucky few have lived through downturns like this multiple times in their career. fewer still of those select few are on their first wife after the stress of not knowing how long the pay concessions they had to give up to keep their airline in business would be, or how long they were going to be furloughed this time.
If you can handle those uncertainties and you enjoy flying then stick around. If you think this setback is too stressful, maybe it's not the right career for you.