what is a big drop for t levels

i quit the drug for two and a half months then quit after experienceing side effects i had my T levels check and it was 735, later i had them checked in april and it is 610. Could this be part of my problem is this a big drop in T levels. Also i just remebered i had my hormones checked when i was 17 think i could use out of those tests. I kind of wondering if my T levels keep dropping