Hi, @kaleigh, you are exactly correct. It is very possible that this record still exists in the now unused DNS configuration at namecheap. If so, the most direct solution (that I can think of) is to find that now unused DNS record, note the details, and then make a duplicate DNS record at Netlify.
If you do this, I recommend looking through all of the previous DNS records to see if there are others that might also benefit from being copied to Netlify DNS. We have a “common issue” type topic about this here also:
If there are other questions, we’re happy to answer.