PSA total bajo y PSA libre bajo

I was hoping someone can help me understand some of the numbers I had on my PSA test. I am scheduled for an MRI next month, but the results have me a little worried. I am 51 years old and my total PSA came back at 2.4, but my free psa came back at 8. My DRE came back normal and I have no symptoms. Is this something that I should be worried about? Wouldn’t my PSA total be higher? Thank you in advance.

A PSA that low with no symptoms means: enjoy your life, keep an eye on it, improve your diet and be glad.