If your husband earned at least $3,000 from working then you should be eligible for a payment. The payments are being sent out based on the last 2 digits of the taxpayer's social security number. Checks began to be sent out May 16th and will continue through July 11th according to social security number range. The IRS links below provide the payment schedule, an online calculator, and status of payment.
Paying estimated taxes will not affect the payment. If you enter certain information in the link below you can check the status of the payment.