With a FC reading of 21, your pH results won't be valid. Get some distilled water and mix half pool water and half distilled and then run your pH test with that. (No adjustments need to be made with the result. Just read it like you normally do.) Then, report back with that pH reading. Don't worry about the TA right now.

Your FC is pretty high but with a fairly low CYA like you have, it will come down. I probably wouldn't swim in it until it comes down some. Probably actually wouldn't hurt skin but would be tough on swimsuits. If you do decide to get in, wear an old suit that you don't care if it fades.