Depends on your estrogen levels. If your LH is normal but your aromase enzyme level is high you might produce a normal amount of test and convert is immediately to estrogen, yielding a low test level which could be corrected with an AI. HOWEVER, it more likely the case you need a SERM. Why do you think your test is low? If you had bloods did you get anything else checked, e.g. estrogen or LH?