How long does it take for varicocele to cause irreversible damage? (18M)

I’m 18M, got diagnosed with a varicocele (no grade was provided, but it’s at least a grade 2 as it was diagnosed without an ultrasound) at urgent care on Friday. They recommended a urologist appointment, I now have one scheduled two weeks from now. Is two weeks enough for permanent damage to set in? I
felt fine up until 3 days ago, there is now a noticeable dull ache. My ejaculate has also been noticeably watery, and my sex drive has decreased (though, this is probably just from stress and not necessarily anything hormonal). Should I keep looking for a closer urologist opening?