That is really a question for PMI to answer. I'm sure that they have rules in place for lapsed certification. Do you have all your continuing education credits logged in? If not you may be setting yourself up to re-apply and take the exam over again in the worst-case scenario.
Like the title says my certification expired, what should I do? The title really helped boost me to where I am now but my certification expired a couple of months ago, can I renew and keep my certification?
Training for Project Management Professional (PMP)®, PMI Agile Certified Practitioner (PMI-ACP)®, and Certified Associate in Project Management (CAPM)®