You can pause your account activity at any time by clicking on the linked payment on your homepage and then the 3 dots in the top right.
When you're ready for withdrawals to start again, just unpause it. It will not backdate and won't include transactions that occurred while your payment was paused, so you don't need to worry about a huge sum of cash coming out of your checking account.
However, withdrawals already initiated that were not canceled individually will still go through. Additionally, pausing activity on a payment account does not pause the actual payment from sending out on the scheduled date.