I had a TS clearance approximately 7 years ago but had my creds taken because I was going through some personal stuff and I sent an email to the wrong place. And it had PII. I continued to work contract work for another company doing Public Trust Investigations. I recently got creds to work the paper proof contract and I have worked some cases. They did not tell me that my clearance was reinstated but another contractor hiring for paper proof require a TS.
Reach out to your FSO, they should be able to check the status of your clearance.