Checking testo levels on cycle

How long do you wait before going to check your testosterone levels while on cycle? Is 2-3 weeks enough to show on the test results if the gear is legit or no?

Also, is it enough to check the general testo levels or do I need to check the free testo levels also to know if the gear is legit? (Need the cheaper way)

Using testo Cyp + Deca at 375mg a week each.

5 half lives, but you are pretty close by the end of the 3rd