How long can you stay on proviron? Will SHBG and Est shoot back up when you come off?

Here's where I'm at after PCT
Total Test: 917 ng/ml
Free Test: 146 pg/ml
SHBG: 32
LH: 7.2
FSH: 2.9
Estradiol: 54

Obviously, Free test is low and SHBG and Est are high. Trying to get my free test back up.