Can't say why they made you feel better, i doubt there are many studies of only LH in males because normally LH triggers T.
That said, if you tried a restart, and tested T AFTER you stopped taking clomid, all that proves is that a restart isn't an option for you. It doesn't prove that you didn't have increased T while on clomid.
Apparently, LH comes in pulses, your test may have caught that, hard to be sure.
From your symptoms only, sounds like you are secondary, you did benefit from the SERM, but a restart isn't an option for you.