OP your initial post in missing information ... you stated that you ran an 18 week cycle ... you did not give your age or whether or not you were on TRT before your 18 week cycle.
If you were not on TRT ... do not keep taking 100mg of test per week ... your natural system will never rebound. You'll need to run a complete PCT .. tons of threads on PCT protocol here.
Also, understand to recover from a 18 week cycle is going to take time.