Go ahead and take the deduction (but see note below).
In the unlikely event of an audit, all they do is ask for proof of your deductions. That should be easy for you to provide.
The $300 charitable contribution thing from the CARES Act is for the 2020 tax return, not the current 2019 tax return.
*Note*: Be sure the deductions qualify. If any single one-day donation was $250 or more, you need a written acknowledgment from the charitable organization that meets certain criteria.