How do I know if I will still get stimulus check

If you qualify then yes you will get a check and it will be mailed unless you put DD info on the IRS GET MY PAYMENT site timely ...

Read the FAQs :   https://www.irs.gov/coronavirus/get-my-payment-frequently-asked-questions#paymentnot

Yes, you are eligible for a stimulus payment if you are not being claimed as a dependent and are a US citizen or US resident.

https://www.irs.gov/coronavirus/economic-impact-payment-information-center

A24. No, the IRS will not send Payments to accounts used to make a payment to the IRS. After you properly verify your identity, the Get My Payment tool will allow you to submit your bank account information if your Payment has not been processed. Providing your bank information is the fastest way to receive your Payment. If we do not have bank information for you, your Payment will be mailed to the address we have on file for you.