It’s just a bit of fluid that collects near where the testes will descend, its fairly common and usually goes away on its own by their first birthday. Sometimes they need a small surgery to drain/remove it, but usually not.

My doctor hasn't been the greatest she hasn't given me any ansite on what to expect and this is my first pregnancy

In my expirience it's not something to worry about then.

She hasn't said anything it was on my chart

What did your OB say?