Likely Inhibit-p. My prolactin level is 20 (got measured twice) which is above the reference range of 18. Symptoms are low libido. Bioavailable test is also 4.2 on a range of 1.6 to 13.2. I just turned 30.
Did your doctor seem concerned?
The 3 supplements together will be fine. Numbers can only tell so much - low libido can also be caused by stress, poor diet, depression, anxiety, etc.
My test levels are above average at 15.8ng/ml but I still have low libido at times because of other things going on.
Try those supplements you've listed, if you want, but also try to eliminate some stress from your life. It's harder than it sounds but can be done. Also, don't be ashamed of taking medication if needed. Sometimes that is all we need to help get us back into "balance" and then later down the road you might be fine to come off - ask doctor.
PS- I'm 30 as well.