We really need to know the cya reading. In the meantime, test it at least 2x a day, and 3x a day is better if you can do it. Each time, add enough bleach to bring your cl level back up to 15. The key to clearing a pool is to sustain the high cl reading. If you let it yo-yo up and down, you'll never clear it. You really need a test kit that measures higher than 5 like the one Ben sells at the sister site to this forum www.poolsolutions.com which is what most of us use. But for now, you can dilute your sample and make your kit go higher than 5. Take one part pool water and one part distilled water, mix them together, test as usual and multiply the result by 2. If you need to go higher than this, take one part pool water and two parts distilled, multiply result by 3, etc. It does lose some accuracy with each dilution but it is better than nothing.

(After we get your cya reading, we may need to adjust what you need to keep your chlorine at but for now, go with 15.)