@hose If you have stayed in the US since your re-registration in 2016, I am pretty sure you have a valid TPS unless USCIS withdrew it based on individual ineligibility. The only way to check is if you were issued an EAD card back then with an expiration date of 06/24/2018. Then you can go to Self Check to verify your employment eligibility

https://www.e-verify.gov/employees/mye-verify/self-check

If you were not issued an EAD, then the only way to verify your status is by filing for a new EAD with your original and reregistration notices.

Best of Luck!