Check if Existing Process Builder Reminder Record Exists

Question

I have created a process in which entry criteria is that if case is in 'required Information' state it enters in the process and schedule a reminder for 30 days after. Now I am updating this process to send the reminder after 60 days.

Problem is, when I set it for 60 days I want to check if there is any 30 days reminder already scheduled for this same case record. I can see that in Time Based Workflow but how can I check in process that if there is already a reminder set than do not set another reminder for 30 days or update the existing one from 30 days to 60 days

Thanks in Advance