You may be able to find a reputable pool store who can test the CYA for you. Make sure they use the 'disappearing black dot' test and not strips, though.

While you are waiting for your kit to arrive, you can use a dilution method to force your kit to read higher. It isn't super accurate, but better than nothing. Info about it here:

Testing Without a Good Kit

Keep adding bleach. And, your pH is fine at 7.6.