I took my baby off one side because of a cracked nipple for several weeks and pumped the sore side. Now he's back to nursing both sides, but my milk supply is less on the side I was pumping. I can see a difference in the breast. If your baby is nursing again at the breast then, yes, your supply should go back up. You didn't say what type pump you were using.
Some pumps are better than others.
But even the best pump is not going to do as good a job as a baby. Most likely what happened is that the other side just began making more milk. Mother Nature knows how to take care of things. But you can help increase the supply by allowing your baby to start on that side each time for a couple days. It does not matter if you get any milk out or not.