Yellow leaves..should I call it quits?

Naah, I'd let her continue. She'll lose some more leaves, as she spends the water and nutrients in them, while she recuperates after the drought. Just get back to the water cycle you had before, and she should be okay. - If you plan on another grow, then you can easily start germinating a new seed tho. It'll be a couple of weeks before the new one will truly need the space. So you can have her stay there a bit longer, and harvest once the new one gets big enough to take her place. OR you can just harvest now.. But without seeing the trichomes, I can't say whether you'll get high from it or not.