how to fix cookies when I added too much baking soda?

If you have some idea how much "too much" baking soda you added, you could make another batch of dough without adding more soda and then mix the two together. Most cookie dough can be frozen, so you would not have to bake up twice as many cookies as you planned to make. Once you have the two doughs mixed, bake off a test cookie and check for taste. If it has solved your challenge, then you can wrap and freeze what you don't want to use and proceed with the baking for the rest. If you don't have enough chips for a second batch of dough, feel free to add in other things- raisins, M&M's, nuts, chopped candy bars, or such. And no- the additions will not balance out extra baking soda.