I'm 24 years old and I have low libido, low motivation, fatigue, and brain fog. I also have very low penis sensitivity as well which is worrying me. I went to the doctor and asked for a hormone panel. The doctor said my test was "normal". My total t could definitely be better, but my free T was below the reference range. Could my low free testosterone be causing my symptoms? I'd appreciate some opinions.

Total Testosterone: 429 ng/dL (348-1197)
Free Testosterone: 9.1 pg/mL (9.3-26.5)
Prolactin: 6.0 ng/ml (2.1-17.7)
Lutenizing Hormone: 2.4 mIU/ml (1.5-9.3)
FSH: 2.6 mIU/ml (1.4-18.1)
Estradiol: 20 pg/ml (0-39.8)
DHEA: 292.8 ug/dL (164.3-530.5)
SHBG: 27.0 nmol/L (16.5-55.9)