Blood tests are not very helpful unfortunately with hormones.
The feedback loops can be down to negatives (one hormone lowering another one) or positives (the same homone raising another one).
A good example is when you have sugar, it raises insulin (positive) and the insulin then lowers blood sugar (negative). The outcome is back to square one as the body will always attempt to establish homeostasis.
If you need something though, then it may be accepted, although the body may already have adapted to dampening down receptors, again to try to rebalance itself, so can take a while to re-adapt.
Best to go by how you feel, particularly long term, as short term hormones can also create an initial high which then falls later on, a bit like an alcohol high followed by a hangover.
The best measure is when you find other parts of your health starting to heal, then you know you're on the right track!