proviron can be taken in pct and helps with libido, but bloods are in order, the length of your cycle and what you took for eg 4 weeks var (which I have known some to do no matter how stupid it is) is different than 18 weeks tren, will have to figure into your shut down, did you do any HCG to start pct? lots and lots of variables before anyone can point you I the right direction. A common cause of low libido is low estrogen for me, also sometimes when it is very high same-low libido. if you want better guesses list the details of your cycle, length, AI or not, etc...