I just took a follicle-stimulating hormone test. What is normal?

I had blood work done to check on some things. My level is 6.1. I am 25 and the test results do not show a standard range. Is that normal or low or high? I am worried about these tests because I am ttc and there is to much tumor talk in regards to this test. I also took a thyroid and Prolactin which were both normal. I took the test because my periods are 40-42 days apart. I also have lost 25 lbs in 3 months. (Just some background) Any help?