Yes, I would definitely wait until the morning to retest, and adding the baking soda over a period of time. Dumping it in all at once is going to cloud your water. Did your pH move with the last box of Borax? If not, you could use washing soda instead of the borax/baking soda combo since it will raise both pH and TA.

Also, go ahead and add the chlorine--except I'm not sure how you got the 50 oz. With a CYA of 100, you need to have a minimum of 8 ppm of chlorine in order to keep the water clear, and to do that with 6% bleach you need more like 102 oz. That's why we needed the CYA number (and by the way, 100 is a LOT more realistic after using the trichlor, but it is much too high--before you do a lot more chemical addition, I would strongly advise you to drain about 1/2 your water and refill in order to bring it down. Refilling it with tap water should help some with your TA and pH issues, as well.).

Janet