26, female, moderately active, not sexually active and have missed my period - going on 4 months now. no pain, except 2 incidents within a week consisting of sharp stabbing stomach cramps that stopped once i visited the bathroom. no other symptoms ?

Visit OBGYN: Hello! There are different reasons why you may be missing your periods, which might include problems with stress, hormones, uterus, to name a few. I would recommend going to your OBGYN so she/he can ask you more specific questions about your problem, perform a complete physical and gynecological exam, and perform the studies that might be necessary (ultrasound, labs, etc).