blood levels

My trough on 200mg was 980, at 150mg its 880, I wanted to try 125mg, and I felt good in the first two weeks before it started dip and I began getting tired etc. I just got blood work and it shows 500mg, Im very suprised, thats only a 16% decrease so linearly it should be more like 750-830.

I've noticed that my total and free drop pretty drastically if I skip a week of pinning (cypionate). They'll go from 1200 to <500. Yet the last time I came off trt, some symptoms of low T didn't start until six-weeks-off at which time they hit me hard. Unfortunately I didn't test my levels for...