I would disagree with Anna and say you need to get your pH up first. I personally would never add 2lbs of baking soda to a 5000 gallon pool all at once. I have a 20,000 gallon pool and I never add more than one pound at a time. Plus, T/A is your least concern right now.

I would add about 1/4 box of either Borax or Washing Soda (on that we agree) but do NOT add a full box of either yet. Start small, test, and add more. Otherwise you risk overshooting your target. I've seen people use the pool calculator for acid demand or base demand and overshoot too many times. Too many factors aren't compensated for. So it's better to use less, test, and add more. Otherwise you'll now have to add acid to bring it down.

Meanwhile, you need to get a better way to test pH. Strips are NOT accurate or reliable. Your pH may be quite a bit higher.

You'll need a proper test kit but in the meantime you can either get a simple OTO kit that tests chlorine and pH for about $7 or go to Walmart and get the HTH 5-way or 6-way drop test kit (little bottles) for about $15. It's a good alternative to the more expensive but ideal Taylor Technologies K-2006.

You can get the Taylor K-2006 from taylortechnologies dot com, amatoind dot com or there's a place on eBay (I think) that makes a donation go to Pool Forum (aylad or Watermom can tell you).