I had a glucose bld test after 13 1/4 hrs of fasting.i was active during it.have normal bld sugar levl.was it a too long fasting period?was it harmful

Shouldn't be a prob: I believe you got a very accurate test result. I also don't think u did any damage to yourself. I may be wrong, but it sounds like you were expecting a different result. A negative test can be good news, but can be frustrating if u don't know what the problem is. Don't give up! Check thyroid (TSH, T3, (liothyronine) T4, free T4) & sex hormone levels (FSH, LH, estradiol, progesterone, testosterone).