Deductions & credits

In years past, I have always itemized until last year for the tax year 2018.  I did not have enough deductions, therefore I took the standard deduction.  I have always donated to several organizations, some cash, some clothing and furniture.  Can I combine last year's (2018) donations with my 2019 donations for the 2019 tax year.  I still don't believe I will have enough donations and probably wouldn't until 2020.  Is this permitted?