RN License from Pennsylvania expiring because of unavailability SSN

I am holder of RN Licese from pannsylvania and is about to expire. When I have renewed it 2 yrs ago I had no problem as I signed a waiver for not available Social Security Number.
Questions:
1.What is to be expected when my RN license expire?
2.How do I activate again?
3. I need this license active as no employer can sponsor me to come in US and get the SSN as required.
4. I have not used /worked in US with this license.
5. Am I loosing the benefits to renew my license now without havig this credits or there is a chance?

It looks like I will be running like humster on the wheel.

Anybody from PA pleasze help with info if possible.