I sent my FMLA, paper work to HR on the 20th of December, I was told I qualified. I received an email from HR saying they have 7 to 10 days decide.

If you have not received an answer as of today, consult a lawyer.  They should tell you within 7 days of the certification process if any deficiency, but they may need altnerative or seek alternative medical opinion at their expense.  They needed to tell you in writing in 7 days if fmla application was deficient.