Is there such thing as a minor limb crack?

I ask because I found one on my upper limb, its REALLY tough to see. I already called the company and limbs are being sent for the dealer to replace and all that, but with our season opening in just a few days and me not needing to shoot much the rest of the way, I just wondered if I could have gotten thru the season, or was I right in getting new limbs for it.