Jessica,

Thanks for the photos.  I'd like to start by saying that I am not an expert in Continental Currency or US or Colonial coins of this time.  However, in looking at your piece, I'm going to say that it definitely looks like many of the fakes of this issue I've seen over the years.  The piece is in rough shape, but I can tell from it that the strike is quite weak and it looks like it was made from poorly made dies with a further lack of detail.  There's a crispness of detail on the originals which isn't present in your piece.  Here's our host's page on this issue so you can see what a genuine one looks like:

https://www.ngccoin.com/coin-explorer/early-american-post-declaration-1776-1820-pscid-122/1776-pewter-curency-continen-coinid-108176

It's important to note two things regarding this issue.  First off, these coins are heavily faked.  There are many more fakes of these floating around out there than real ones.  Secondly, pewter is a cheap alloy of common base metals.  Because of this, most of the fakes out there are pewter like the real ones are, so a pewter composition is not a guarantee of having a genuine piece.  Like I said before, I am not an expert on these issues, but I have seen many fakes of this coin that look very similar to yours.  I hope that someone who is more knowledgeable than I am on this issue will jump in, but if this were my coin, I definitely wouldn't spend any money to certify it.

I hope this was of some help, even if the news wasn't great.

~Tom